Channel Coding (commpy.channelcoding)¶
Galois Fields¶
GF(x, m) |
Defines a Binary Galois Field of order m, containing n, where n can be a single element or a list of elements within the field. |
Algebraic Codes¶
cyclic_code_genpoly(n, k) |
Generate all possible generator polynomials for a (n, k)-cyclic code. |
Convolutional Codes¶
Trellis(memory, g_matrix[, feedback, code_type]) |
Class defining a Trellis corresponding to a k/n - rate convolutional code. |
conv_encode(message_bits, trellis[, …]) |
Encode bits using a convolutional code. |
viterbi_decode(coded_bits, trellis[, …]) |
Decodes a stream of convolutionally encoded bits using the Viterbi Algorithm |
Turbo Codes¶
turbo_encode(msg_bits, trellis1, trellis2, …) |
Turbo Encoder. |
map_decode(sys_symbols, non_sys_symbols, …) |
Maximum a-posteriori probability (MAP) decoder. |
turbo_decode(sys_symbols, non_sys_symbols_1, …) |
Turbo Decoder. |
LDPC Codes¶
get_ldpc_code_params(ldpc_design_filename) |
Extract parameters from LDPC code design file. |
ldpc_bp_decode(llr_vec, ldpc_code_params, …) |
LDPC Decoder using Belief Propagation (BP). |
Interleavers and De-interleavers¶
RandInterlv(length, seed) |
Random Interleaver. |