rx_depuncture.m

来自「全部的译码器的程序是用matlab编程的」· M 代码 · 共 22 行

function depunctured_bits = rx_depuncture(in_bits, code_rate)

[punc_patt, punc_patt_size] = get_punc_params(code_rate);%调用截断卷积码函数

% Remainder bits are the bits in the and of the packet that are not integer mulitple of the puncture window size即将接收序列按删除窗口长度分组的比特数
num_rem_bits = rem(length(in_bits), length(punc_patt));

depuncture_table = zeros(punc_patt_size, fix(length(in_bits)/length(punc_patt)));

depunc_bits = reshape(in_bits(1:length(in_bits)-num_rem_bits), length(punc_patt), ...
   fix(length(in_bits)/length(punc_patt)))  %将是删除窗口长度整数倍的比特整形成矩阵

depuncture_table(punc_patt,:) = depuncture_table(punc_patt,:) + depunc_bits;

%depuncture the remainder bits即将余下的比特进行反截断
rem_bits = in_bits(length(in_bits)-num_rem_bits+1:length(in_bits));
rem_depunc_bits = zeros(1,punc_patt_size);

rem_depunc_bits(punc_patt(1:num_rem_bits)) = rem_depunc_bits(punc_patt(1:num_rem_bits)) + rem_bits;

depunctured_bits = [depuncture_table(:)' rem_depunc_bits];