Binary Punctured Convolutional Code Class. More...
#include <itpp/comm/punct_convcode.h>
Public Member Functions | |
Punctured_Convolutional_Code (void) | |
Constructor. More... | |
virtual | ~Punctured_Convolutional_Code (void) |
Destructor. More... | |
void | set_code (const CONVOLUTIONAL_CODE_TYPE type_of_code, int inverse_rate, int constraint_length) |
Set the code according to built-in tables. More... | |
void | set_generator_polynomials (const ivec &gen, int constraint_length) |
Set generator polynomials. Given in Proakis integer form. More... | |
ivec | get_generator_polynomials () const |
Get generator polynomials. More... | |
virtual double | get_rate () const |
Return rate of code. More... | |
void | set_method (const CONVOLUTIONAL_CODE_METHOD method) |
Set encoding and decoding method (Trunc, Tail, or Tailbite) More... | |
void | set_puncture_matrix (const bmat &pmatrix) |
Set puncture matrix (size n*Period) More... | |
bmat | get_puncture_matrix () const |
Get puncture matrix. More... | |
int | get_puncture_period () const |
Get puncturing period. More... | |
void | init_encoder () |
Set the encoder internal state in start_state (set by set_start_state()). More... | |
void | encode (const bvec &input, bvec &output) |
Encode a binary vector of inputs using specified method. More... | |
bvec | encode (const bvec &input) |
Encode a binary vector of inputs using specified method. More... | |
void | encode_trunc (const bvec &input, bvec &output) |
Encode a binary vector of inputs starting from state set by the set_state function. More... | |
bvec | encode_trunc (const bvec &input) |
Encode a binary vector of inputs starting from state set by the set_state function. More... | |
void | encode_tail (const bvec &input, bvec &output) |
Encoding that begins and ends in the zero state. More... | |
bvec | encode_tail (const bvec &input) |
Encoding that begins and ends in the zero state. More... | |
void | encode_tailbite (const bvec &input, bvec &output) |
Encode a binary vector of inputs using tailbiting. More... | |
bvec | encode_tailbite (const bvec &input) |
Encode a binary vector of inputs using tailbiting. More... | |
virtual void | decode (const vec &received_signal, bvec &output) |
Viterbi decoding using specified method. More... | |
virtual bvec | decode (const vec &received_signal) |
Viterbi decoding using specified method. More... | |
virtual void | decode (const bvec &coded_bits, bvec &decoded_bits) |
Decode a bvec of coded data. More... | |
virtual bvec | decode (const bvec &coded_bits) |
Decode a bvec of coded data. More... | |
void | decode_trunc (const vec &received_signal, bvec &output) |
Viterbi decoding using truncation of memory (default = 5*K) More... | |
bvec | decode_trunc (const vec &received_signal) |
Viterbi decoding using truncation of memory (default = 5*K) More... | |
void | decode_tail (const vec &received_signal, bvec &output) |
Decode a block of encoded data where encode_tail has been used. More... | |
bvec | decode_tail (const vec &received_signal) |
Decode a block of encoded data where encode_tail has been used. More... | |
void | decode_tailbite (const vec &received_signal, bvec &output) |
Decode a block of encoded data where encode_tailbite has been used. Tries all start states. More... | |
bvec | decode_tailbite (const vec &received_signal) |
Decode a block of encoded data where encode_tailbite has been used. Tries all start states. More... | |
bool | inverse_tail (const bvec coded_sequence, bvec &input) |
bool | catastrophic (void) |
Check if the code is catastrophic. Returns true if catastrophic. More... | |
void | distance_profile (ivec &dist_prof, int time, int dmax=100000, bool reverse=false) |
Calculate distance profile. If reverse = true calculate for the reverse code instead. More... | |
void | calculate_spectrum (Array< ivec > &spectrum, int dmax, int no_terms) |
Calculate spectrum. More... | |
void | calculate_spectrum (Array< ivec > &spectrum, int time, int dmax, int no_terms, int block_length=0) |
Calculate spectrum. Suitable when calculating many terms in the spectra. Breadth first search. More... | |
int | fast (Array< ivec > &spectrum, int time, int dfree, int no_terms, int d_best_so_far=0, bool test_catastrophic=false) |
Cederwall's fast algorithm. More... | |
void | reset () |
Reset encoder and decoder states. More... | |
void | encode_bit (const bin &input, bvec &output) |
Encode a binary bit starting from the internal encoder state. More... | |
bvec | encode_bit (const bin &input) |
void | set_start_state (int state) |
Set encoder default start state. More... | |
int | get_encoder_state (void) const |
Get the current encoder state. More... | |
void | set_truncation_length (const int length) |
Set memory truncation length. Must be at least K. More... | |
int | get_truncation_length (void) const |
Get memory truncation length. More... | |
void | distance_profile (ivec &dist_prof, int dmax=100000, bool reverse=false) |
Calculate distance profile. If reverse = true calculate for the reverse code instead. More... | |
int | fast (Array< ivec > &spectrum, const int dfree, const int no_terms, const int Cdfree=1000000, const bool test_catastrophic=false) |
Cederwall's fast algorithm. More... | |
Protected Member Functions | |
int | weight (const int state, const int input, int time) |
The weight of path from state with input (0 or 1) at transition time . More... | |
void | weight (const int state, int &w0, int &w1, int time) |
The weight of the two paths (input 0 or 1) from given state. More... | |
int | weight_reverse (const int state, const int input, int time) |
Weight of the reverse code from state with input (0 or 1) at transition time . More... | |
void | weight_reverse (const int state, int &w0, int &w1, int time) |
The weight of the reverse code of two paths (input 0 or 1) from given state. More... | |
int | next_state (const int instate, const int input) |
Next state from instate given the input. More... | |
int | previous_state (const int state, const int input) |
The previous state from state given the input. More... | |
void | previous_state (const int state, int &S0, int &S1) |
The previous state from state given the input. More... | |
int | weight (const int state, const int input) |
The weight of the transition from given state with the input given. More... | |
void | weight (const int state, int &w0, int &w1) |
The weight of the two paths (input 0 or 1) from given state. More... | |
int | weight_reverse (const int state, const int input) |
The weight (of the reverse code) of the transition from given state with the input given. More... | |
void | weight_reverse (const int state, int &w0, int &w1) |
The weight (of the reverse code) of the two paths (input 0 or 1) from given state. More... | |
bvec | output_reverse (const int state, const int input) |
Output on transition (backwards) with input from state. More... | |
void | output_reverse (const int state, bvec &zero_output, bvec &one_output) |
Output on transition (backwards) with input from state. More... | |
void | output_reverse (const int state, int &zero_output, int &one_output) |
Output on transition (backwards) with input from state. More... | |
void | calc_metric_reverse (const int state, const vec &rx_codeword, double &zero_metric, double &one_metric) |
Calculate delta metrics for 0 and 1 input branches reaching state. More... | |
void | calc_metric (const vec &rx_codeword, vec &delta_metrics) |
Calculate delta metrics for all possible codewords. More... | |
int | get_input (const int state) |
Returns the input that results in state, that is the MSB of state. More... | |
Protected Attributes | |
int | Period |
The puncture period (i.e. the number of columns in the puncture matrix) More... | |
int | total |
The number of "1" in the puncture matrix. More... | |
bmat | puncture_matrix |
The puncture matrix (n rows and Period columns) More... | |
int | n |
Number of generators. More... | |
int | K |
Constraint length. More... | |
int | m |
Memory of the encoder. More... | |
int | no_states |
Number of states. More... | |
ivec | gen_pol |
Generator polynomials. More... | |
ivec | gen_pol_rev |
Generator polynomials for the reverse code. More... | |
int | encoder_state |
The current encoder state. More... | |
int | start_state |
The encoder start state. More... | |
int | trunc_length |
The decoder truncation length. More... | |
double | rate |
The rate of the code. More... | |
bvec | xor_int_table |
Auxilary table used by the codec. More... | |
imat | output_reverse_int |
output in int format for a given state and input More... | |
CONVOLUTIONAL_CODE_METHOD | cc_method |
encoding and decoding method More... | |
imat | path_memory |
Path memory (trellis) More... | |
Array< bool > | visited_state |
Visited states. More... | |
vec | sum_metric |
Metrics accumulator. More... | |
int | trunc_ptr |
Truncated path memory pointer. More... | |
int | trunc_state |
Truncated memory fill state. More... | |
Related Functions | |
(Note that these are not member functions.) | |
ITPP_EXPORT int | reverse_int (int length, int in) |
Reverses the bitrepresentation of in (of size length) and converts to an integer. More... | |
ITPP_EXPORT int | weight_int (int length, int in) |
Calculate the Hamming weight of the binary representation of in of size length. More... | |
ITPP_EXPORT int | compare_spectra (ivec v1, ivec v2) |
Compare two distance spectra. Return 1 if v1 is less, 0 if v2 less, and -1 if equal. More... | |
ITPP_EXPORT int | compare_spectra (ivec v1, ivec v2, vec weight_profile) |
Compare two distance spectra using a weight profile. More... | |
Binary Punctured Convolutional Code Class.
The codes are given as feedforward encoders an given in the Proakis form. That is the binary generators (K-tuples) are converted to octal integers. Observe that the constraint length (K) is defined as the number of meomory cells plus one (as in Proakis). The puncture matrix should be of size n * Period, where Period is the puncturing period.
Encoding is performed with the encode
function. By default the encode_tail
function is called which automatically add a tail of K-1 zeros and also assume that the encoder starts in the zero state. Observe that decode_tail
is used for data encoded with encode_tail
, and decode_trunc assumes that the memory truncation length either is the default (5*K) or set using the set_truncation_length
function. Encoding and decoding method can be changed by calling the set_method() function.
Example of use: (rate 1/3 constraint length K=7 ODS code using BPSK over AWGN)
Definition at line 80 of file punct_convcode.h.
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Constructor.
Definition at line 84 of file punct_convcode.h.
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Destructor.
Definition at line 86 of file punct_convcode.h.
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Set the code according to built-in tables.
The type_of_code can be either MFD or ODS for maximum free distance codes (according to Proakis) or Optimum Distance Spectrum Codes according to Frenger, Orten and Ottosson.
Definition at line 94 of file punct_convcode.h.
References itpp::Convolutional_Code::set_code().
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Set generator polynomials. Given in Proakis integer form.
Definition at line 97 of file punct_convcode.h.
References itpp::Convolutional_Code::set_generator_polynomials().
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Get generator polynomials.
Definition at line 100 of file punct_convcode.h.
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Return rate of code.
Reimplemented from itpp::Convolutional_Code.
Definition at line 103 of file punct_convcode.h.
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Set encoding and decoding method (Trunc, Tail, or Tailbite)
Definition at line 106 of file punct_convcode.h.
References itpp::Convolutional_Code::set_method().
void itpp::Punctured_Convolutional_Code::set_puncture_matrix | ( | const bmat & | pmatrix | ) |
Set puncture matrix (size n*Period)
Definition at line 120 of file punct_convcode.cpp.
References it_error_if, itpp::Convolutional_Code::n, Period, puncture_matrix, itpp::Convolutional_Code::rate, and total.
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Get puncture matrix.
Definition at line 111 of file punct_convcode.h.
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Get puncturing period.
Definition at line 113 of file punct_convcode.h.
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Set the encoder internal state in start_state (set by set_start_state()).
Definition at line 116 of file punct_convcode.h.
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Encode a binary vector of inputs using specified method.
Reimplemented from itpp::Convolutional_Code.
Definition at line 136 of file punct_convcode.cpp.
References itpp::Convolutional_Code::cc_method, encode_tail(), encode_tailbite(), and encode_trunc().
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Encode a binary vector of inputs using specified method.
Reimplemented from itpp::Convolutional_Code.
Definition at line 121 of file punct_convcode.h.
References encode().
Referenced by encode().
void itpp::Punctured_Convolutional_Code::encode_trunc | ( | const bvec & | input, |
bvec & | output | ||
) |
Encode a binary vector of inputs starting from state set by the set_state function.
Definition at line 154 of file punct_convcode.cpp.
References itpp::Convolutional_Code::encode_trunc(), itpp::Convolutional_Code::n, Period, and puncture_matrix.
Referenced by encode().
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Encode a binary vector of inputs starting from state set by the set_state function.
Definition at line 126 of file punct_convcode.h.
References encode_trunc().
Referenced by encode_trunc().
void itpp::Punctured_Convolutional_Code::encode_tail | ( | const bvec & | input, |
bvec & | output | ||
) |
Encoding that begins and ends in the zero state.
Encode a binary vector of inputs starting from zero state and also adds a tail of K-1 zeros to force the encoder into the zero state. Well suited for packet transmission.
Definition at line 172 of file punct_convcode.cpp.
References itpp::Convolutional_Code::encode_tail(), itpp::Convolutional_Code::n, Period, and puncture_matrix.
Referenced by encode().
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Encoding that begins and ends in the zero state.
Encode a binary vector of inputs starting from zero state and also adds a tail of K-1 zeros to force the encoder into the zero state. Well suited for packet transmission.
Definition at line 143 of file punct_convcode.h.
References encode_tail().
Referenced by encode_tail().
void itpp::Punctured_Convolutional_Code::encode_tailbite | ( | const bvec & | input, |
bvec & | output | ||
) |
Encode a binary vector of inputs using tailbiting.
Definition at line 190 of file punct_convcode.cpp.
References itpp::Convolutional_Code::encode_tailbite(), itpp::Convolutional_Code::n, Period, and puncture_matrix.
Referenced by encode().
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Encode a binary vector of inputs using tailbiting.
Definition at line 148 of file punct_convcode.h.
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Viterbi decoding using specified method.
Reimplemented from itpp::Convolutional_Code.
Definition at line 224 of file punct_convcode.cpp.
References itpp::Convolutional_Code::cc_method, decode_tail(), decode_tailbite(), and decode_trunc().
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Viterbi decoding using specified method.
Reimplemented from itpp::Convolutional_Code.
Definition at line 155 of file punct_convcode.h.
References decode().
Referenced by decode().
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Decode a bvec of coded data.
Reimplemented from itpp::Convolutional_Code.
Definition at line 210 of file punct_convcode.cpp.
References it_error.
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Decode a bvec of coded data.
Reimplemented from itpp::Convolutional_Code.
Definition at line 215 of file punct_convcode.cpp.
References it_error.
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Viterbi decoding using truncation of memory (default = 5*K)
Reimplemented from itpp::Convolutional_Code.
Definition at line 244 of file punct_convcode.cpp.
References itpp::Convolutional_Code::decode_trunc(), it_warning, itpp::Convolutional_Code::n, Period, puncture_matrix, and total.
Referenced by decode().
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Viterbi decoding using truncation of memory (default = 5*K)
Reimplemented from itpp::Convolutional_Code.
Definition at line 164 of file punct_convcode.h.
References decode_trunc().
Referenced by decode_trunc().
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Decode a block of encoded data where encode_tail has been used.
Thus is assumes a decoder start state of zero and that a tail of K-1 zeros has been added. No memory truncation.
Reimplemented from itpp::Convolutional_Code.
Definition at line 294 of file punct_convcode.cpp.
References itpp::Convolutional_Code::decode_tail(), it_warning, itpp::Convolutional_Code::n, Period, puncture_matrix, and total.
Referenced by decode().
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Decode a block of encoded data where encode_tail has been used.
Thus is assumes a decoder start state of zero and that a tail of K-1 zeros has been added. No memory truncation.
Reimplemented from itpp::Convolutional_Code.
Definition at line 179 of file punct_convcode.h.
References decode_tail().
Referenced by decode_tail().
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Decode a block of encoded data where encode_tailbite has been used. Tries all start states.
Reimplemented from itpp::Convolutional_Code.
Definition at line 345 of file punct_convcode.cpp.
References itpp::Convolutional_Code::decode_tailbite(), it_warning, itpp::Convolutional_Code::n, Period, puncture_matrix, and total.
Referenced by decode().
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Decode a block of encoded data where encode_tailbite has been used. Tries all start states.
Reimplemented from itpp::Convolutional_Code.
Definition at line 184 of file punct_convcode.h.
bool itpp::Punctured_Convolutional_Code::inverse_tail | ( | const bvec | coded_sequence, |
bvec & | input | ||
) |
Definition at line 404 of file punct_convcode.cpp.
bool itpp::Punctured_Convolutional_Code::catastrophic | ( | void | ) |
Check if the code is catastrophic. Returns true if catastrophic.
Definition at line 455 of file punct_convcode.cpp.
References itpp::Convolutional_Code::m, itpp::Convolutional_Code::next_state(), Period, and weight().
void itpp::Punctured_Convolutional_Code::distance_profile | ( | ivec & | dist_prof, |
int | time, | ||
int | dmax = 100000 , |
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bool | reverse = false |
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) |
Calculate distance profile. If reverse = true calculate for the reverse code instead.
Definition at line 516 of file punct_convcode.cpp.
References itpp::Convolutional_Code::m, itpp::Convolutional_Code::next_state(), Period, itpp::reverse(), weight(), and weight_reverse().
Referenced by fast().
void itpp::Punctured_Convolutional_Code::calculate_spectrum | ( | Array< ivec > & | spectrum, |
int | dmax, | ||
int | no_terms | ||
) |
Calculate spectrum.
Calculates both the weight spectrum (Ad) and the information weight spectrum (Cd) and returns it as ivec:s in the 0:th and 1:st component of spectrum, respectively. For a punctrued code the spectrum is a sum of the spectras of all starting positions. Suitable for calculating many terms in the spectra (uses an breadth first algorithm). It is assumed that the code is non-catastrophic or else it is a possibility for an eternal loop.
Observe that there is a risk that some of the integers are overflow if many terms are calculated in the spectrum.
Definition at line 734 of file punct_convcode.cpp.
References calculate_spectrum(), Period, and itpp::spectrum().
Referenced by calculate_spectrum().
void itpp::Punctured_Convolutional_Code::calculate_spectrum | ( | Array< ivec > & | spectrum, |
int | time, | ||
int | dmax, | ||
int | no_terms, | ||
int | block_length = 0 |
||
) |
Calculate spectrum. Suitable when calculating many terms in the spectra. Breadth first search.
Use this function to evaluate the spectum whith a speccific puncturing period, or to calculate the spectrum for block transmission. To calculate spectra for block transmission:
Definition at line 750 of file punct_convcode.cpp.
References itpp::elem_mult(), itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, itpp::Convolutional_Code::next_state(), Period, itpp::spectrum(), and weight().
int itpp::Punctured_Convolutional_Code::fast | ( | Array< ivec > & | spectrum, |
int | time, | ||
int | dfree, | ||
int | no_terms, | ||
int | d_best_so_far = 0 , |
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bool | test_catastrophic = false |
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) |
Cederwall's fast algorithm.
true
), and returns 1 if everything went right. calc_spectrum
instead. Observe that there is a risk that some of the integers are overflow if many terms are calculated in the spectrum.
Definition at line 589 of file punct_convcode.cpp.
References distance_profile(), itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, itpp::Convolutional_Code::next_state(), Period, itpp::reverse(), itpp::spectrum(), weight(), and weight_reverse().
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The weight of path from state
with input
(0 or 1) at transition time
.
Definition at line 38 of file punct_convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, itpp::Convolutional_Code::n, and puncture_matrix.
Referenced by calculate_spectrum(), catastrophic(), distance_profile(), and fast().
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The weight of the two paths (input 0 or 1) from given state.
Definition at line 76 of file punct_convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::m, itpp::Convolutional_Code::n, and puncture_matrix.
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Weight of the reverse code from state
with input
(0 or 1) at transition time
.
Definition at line 57 of file punct_convcode.cpp.
References itpp::Convolutional_Code::gen_pol_rev, itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, itpp::Convolutional_Code::n, Period, and puncture_matrix.
Referenced by distance_profile(), and fast().
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The weight of the reverse code of two paths (input 0 or 1) from given state.
Definition at line 97 of file punct_convcode.cpp.
References itpp::Convolutional_Code::gen_pol_rev, itpp::Convolutional_Code::m, itpp::Convolutional_Code::n, Period, and puncture_matrix.
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Reset encoder and decoder states.
Definition at line 605 of file convcode.cpp.
References itpp::Convolutional_Code::init_encoder(), itpp::Convolutional_Code::start_state, itpp::Convolutional_Code::sum_metric, itpp::Convolutional_Code::trunc_ptr, itpp::Convolutional_Code::trunc_state, and itpp::Convolutional_Code::visited_state.
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Encode a binary bit starting from the internal encoder state.
To initialize the encoder state use set_start_state() and init_encoder()
Definition at line 719 of file convcode.cpp.
References itpp::Convolutional_Code::encoder_state, itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::m, itpp::Convolutional_Code::n, and itpp::Convolutional_Code::xor_int_table.
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Definition at line 214 of file convcode.h.
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Get the current encoder state.
Definition at line 296 of file convcode.h.
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Set memory truncation length. Must be at least K.
Definition at line 300 of file convcode.h.
References it_error_if, and itpp::length().
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Get memory truncation length.
Definition at line 307 of file convcode.h.
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Calculate distance profile. If reverse = true calculate for the reverse code instead.
Definition at line 1133 of file convcode.cpp.
References itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, itpp::Convolutional_Code::next_state(), itpp::reverse(), itpp::Convolutional_Code::weight(), and itpp::Convolutional_Code::weight_reverse().
Referenced by itpp::Convolutional_Code::fast().
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Cederwall's fast algorithm.
Calculates both the weight spectrum (Ad) and the information weight spectrum (Cd) and returns it as ivec:s in the 0:th and 1:st component of spectrum, respectively. The FAST algorithm is good for calculating only a few terms in the spectrum. If many terms are desired, use calc_spectrum instead. The algorithm returns -1 if the code tested is worse that the input dfree and Cdfree. It returns 0 if the code MAY be catastrophic (assuming that test_catastrophic is true), and returns 1 if everything went right.
dfree
the free distance of the code (or an upper bound) no_terms
including the dfree term that should be calculated Cdfree
is the best value of information weight spectrum found so farObserve that there is a risk that some of the integers are overflow if many terms are calculated in the spectrum.
See IT No. 6, pp. 1146-1159, Nov. 1989 for details.
Definition at line 1299 of file convcode.cpp.
References itpp::Convolutional_Code::distance_profile(), itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, itpp::Convolutional_Code::next_state(), itpp::reverse(), itpp::spectrum(), itpp::Convolutional_Code::weight(), and itpp::Convolutional_Code::weight_reverse().
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Next state from instate given the input.
Definition at line 374 of file convcode.h.
Referenced by itpp::Convolutional_Code::calculate_spectrum(), calculate_spectrum(), itpp::Convolutional_Code::catastrophic(), catastrophic(), itpp::Convolutional_Code::distance_profile(), distance_profile(), itpp::Convolutional_Code::fast(), and fast().
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The previous state from state given the input.
Definition at line 378 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), and itpp::Convolutional_Code::decode_trunc().
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The previous state from state given the input.
Definition at line 382 of file convcode.h.
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The weight of the transition from given state with the input given.
Definition at line 42 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, and itpp::Convolutional_Code::n.
Referenced by itpp::Convolutional_Code::calculate_spectrum(), itpp::Convolutional_Code::catastrophic(), itpp::Convolutional_Code::distance_profile(), and itpp::Convolutional_Code::fast().
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The weight of the two paths (input 0 or 1) from given state.
Definition at line 85 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::m, and itpp::Convolutional_Code::n.
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The weight (of the reverse code) of the transition from given state with the input given.
Definition at line 64 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol_rev, itpp::Convolutional_Code::K, itpp::Convolutional_Code::m, and itpp::Convolutional_Code::n.
Referenced by itpp::Convolutional_Code::distance_profile(), and itpp::Convolutional_Code::fast().
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The weight (of the reverse code) of the two paths (input 0 or 1) from given state.
Definition at line 109 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol_rev, itpp::Convolutional_Code::m, and itpp::Convolutional_Code::n.
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Output on transition (backwards) with input from state.
Definition at line 132 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::n, and itpp::Convolutional_Code::xor_int_table.
Referenced by itpp::Convolutional_Code::set_generator_polynomials().
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Output on transition (backwards) with input from state.
Definition at line 150 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::n, and itpp::Convolutional_Code::xor_int_table.
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Output on transition (backwards) with input from state.
Definition at line 169 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::n, and itpp::Convolutional_Code::xor_int_table.
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Calculate delta metrics for 0 and 1 input branches reaching state.
Definition at line 190 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::n, and itpp::Convolutional_Code::xor_int_table.
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Calculate delta metrics for all possible codewords.
Definition at line 213 of file convcode.cpp.
References itpp::Convolutional_Code::gen_pol, itpp::Convolutional_Code::n, itpp::Convolutional_Code::no_states, itpp::pow2i(), and itpp::Convolutional_Code::xor_int_table.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), and itpp::Convolutional_Code::decode_trunc().
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Returns the input that results in state, that is the MSB of state.
Definition at line 408 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), and itpp::Convolutional_Code::decode_trunc().
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Reverses the bitrepresentation of in (of size length) and converts to an integer.
Definition at line 1442 of file convcode.cpp.
References itpp::length().
Referenced by itpp::Convolutional_Code::set_generator_polynomials().
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Calculate the Hamming weight of the binary representation of in of size length.
Definition at line 1460 of file convcode.cpp.
References itpp::length().
Referenced by itpp::Convolutional_Code::set_generator_polynomials().
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Compare two distance spectra. Return 1 if v1 is less, 0 if v2 less, and -1 if equal.
Definition at line 1472 of file convcode.cpp.
References it_assert_debug.
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Compare two distance spectra using a weight profile.
Return 1 if v1 is less, 0 if v2 less, and -1 if equal.
Definition at line 1492 of file convcode.cpp.
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The puncture period (i.e. the number of columns in the puncture matrix)
Definition at line 260 of file punct_convcode.h.
Referenced by calculate_spectrum(), catastrophic(), decode_tail(), decode_tailbite(), decode_trunc(), distance_profile(), encode_tail(), encode_tailbite(), encode_trunc(), fast(), set_puncture_matrix(), and weight_reverse().
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The number of "1" in the puncture matrix.
Definition at line 262 of file punct_convcode.h.
Referenced by decode_tail(), decode_tailbite(), decode_trunc(), and set_puncture_matrix().
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The puncture matrix (n rows and Period columns)
Definition at line 264 of file punct_convcode.h.
Referenced by decode_tail(), decode_tailbite(), decode_trunc(), encode_tail(), encode_tailbite(), encode_trunc(), set_puncture_matrix(), weight(), and weight_reverse().
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Number of generators.
Definition at line 411 of file convcode.h.
Referenced by itpp::Convolutional_Code::calc_metric(), itpp::Convolutional_Code::calc_metric_reverse(), itpp::Convolutional_Code::decode_tail(), decode_tail(), itpp::Convolutional_Code::decode_tailbite(), decode_tailbite(), itpp::Convolutional_Code::decode_trunc(), decode_trunc(), itpp::Convolutional_Code::encode_bit(), itpp::Convolutional_Code::encode_tail(), encode_tail(), itpp::Convolutional_Code::encode_tailbite(), encode_tailbite(), itpp::Convolutional_Code::encode_trunc(), encode_trunc(), itpp::Convolutional_Code::inverse_tail(), itpp::Convolutional_Code::output_reverse(), itpp::Convolutional_Code::set_generator_polynomials(), set_puncture_matrix(), itpp::Convolutional_Code::weight(), weight(), itpp::Convolutional_Code::weight_reverse(), and weight_reverse().
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Constraint length.
Definition at line 413 of file convcode.h.
Referenced by calculate_spectrum(), itpp::Convolutional_Code::distance_profile(), itpp::Convolutional_Code::fast(), fast(), itpp::Convolutional_Code::set_generator_polynomials(), itpp::Convolutional_Code::weight(), weight(), itpp::Convolutional_Code::weight_reverse(), and weight_reverse().
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Memory of the encoder.
Definition at line 415 of file convcode.h.
Referenced by itpp::Convolutional_Code::calculate_spectrum(), calculate_spectrum(), itpp::Convolutional_Code::catastrophic(), catastrophic(), itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::distance_profile(), distance_profile(), itpp::Convolutional_Code::encode_bit(), itpp::Convolutional_Code::encode_tail(), itpp::Convolutional_Code::encode_tailbite(), itpp::Convolutional_Code::encode_trunc(), itpp::Convolutional_Code::fast(), fast(), itpp::Convolutional_Code::inverse_tail(), itpp::Convolutional_Code::set_generator_polynomials(), itpp::Convolutional_Code::weight(), weight(), itpp::Convolutional_Code::weight_reverse(), and weight_reverse().
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Number of states.
Definition at line 417 of file convcode.h.
Referenced by itpp::Convolutional_Code::calc_metric(), itpp::Convolutional_Code::calculate_spectrum(), itpp::Convolutional_Code::catastrophic(), itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), itpp::Convolutional_Code::decode_trunc(), and itpp::Convolutional_Code::set_generator_polynomials().
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Generator polynomials.
Definition at line 419 of file convcode.h.
Referenced by itpp::Convolutional_Code::calc_metric(), itpp::Convolutional_Code::calc_metric_reverse(), itpp::Convolutional_Code::encode_bit(), itpp::Convolutional_Code::encode_tail(), itpp::Convolutional_Code::encode_tailbite(), itpp::Convolutional_Code::encode_trunc(), itpp::Convolutional_Code::inverse_tail(), itpp::Convolutional_Code::output_reverse(), itpp::Convolutional_Code::set_generator_polynomials(), itpp::Convolutional_Code::weight(), and weight().
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Generator polynomials for the reverse code.
Definition at line 421 of file convcode.h.
Referenced by itpp::Convolutional_Code::set_generator_polynomials(), itpp::Convolutional_Code::weight_reverse(), and weight_reverse().
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The current encoder state.
Definition at line 423 of file convcode.h.
Referenced by itpp::Convolutional_Code::encode_bit(), itpp::Convolutional_Code::encode_tail(), itpp::Convolutional_Code::encode_tailbite(), and itpp::Convolutional_Code::encode_trunc().
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The encoder start state.
Definition at line 425 of file convcode.h.
Referenced by itpp::Convolutional_Code::reset(), and itpp::Convolutional_Code::set_generator_polynomials().
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The decoder truncation length.
Definition at line 427 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_trunc(), and itpp::Convolutional_Code::set_generator_polynomials().
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The rate of the code.
Definition at line 429 of file convcode.h.
Referenced by itpp::Convolutional_Code::set_generator_polynomials(), and set_puncture_matrix().
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Auxilary table used by the codec.
Definition at line 431 of file convcode.h.
Referenced by itpp::Convolutional_Code::calc_metric(), itpp::Convolutional_Code::calc_metric_reverse(), itpp::Convolutional_Code::encode_bit(), itpp::Convolutional_Code::encode_tail(), itpp::Convolutional_Code::encode_tailbite(), itpp::Convolutional_Code::encode_trunc(), itpp::Convolutional_Code::inverse_tail(), itpp::Convolutional_Code::output_reverse(), and itpp::Convolutional_Code::set_generator_polynomials().
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output in int format for a given state and input
Definition at line 433 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), itpp::Convolutional_Code::decode_trunc(), and itpp::Convolutional_Code::set_generator_polynomials().
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encoding and decoding method
Definition at line 435 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode(), decode(), itpp::Convolutional_Code::encode(), and encode().
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Path memory (trellis)
Definition at line 437 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), and itpp::Convolutional_Code::decode_trunc().
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Visited states.
Definition at line 439 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), itpp::Convolutional_Code::decode_trunc(), itpp::Convolutional_Code::reset(), and itpp::Convolutional_Code::set_generator_polynomials().
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Metrics accumulator.
Definition at line 441 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_tail(), itpp::Convolutional_Code::decode_tailbite(), itpp::Convolutional_Code::decode_trunc(), itpp::Convolutional_Code::reset(), and itpp::Convolutional_Code::set_generator_polynomials().
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Truncated path memory pointer.
Definition at line 443 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_trunc(), itpp::Convolutional_Code::reset(), and itpp::Convolutional_Code::set_generator_polynomials().
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Truncated memory fill state.
Definition at line 445 of file convcode.h.
Referenced by itpp::Convolutional_Code::decode_trunc(), itpp::Convolutional_Code::reset(), and itpp::Convolutional_Code::set_generator_polynomials().
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