Method for constructing large-girth rule QC-LDPC code based on Fibonacci-Lucas sequence

The invention relates to a method for constructing a large-girth rule QC-LDPC code based on a Fibonacci-Lucas sequence. According to the method, a shift matrix is constructed by utilizing the specialproperty and structure of a Fibonacci-Lucas sequence, then a check matrix is obtained through expansion, the code length and the code rate of the constructed code pattern can be flexibly changed, andthe surrounding length of the check matrix is at least 8. Simulation result shows that the simulation result shows that: the simulation result shows; when the bit error rate is 10 ; The FL-QC-LDPC (3138, 1569) code with the constructed code rate of 0.5 is compared with the DY-QC-LDPC (3138, 1569) code. The F-QC-LDPC (3138, 1569) codes and the LOS-QC-LDPC (3128, 1564) codes can respectively improve the net coding gains of about 0.23 dB, 0.25 dB and 0.4 dB, and have good error correction performance. 本发明涉及一种基于Fibonacci-Lucas数列构造大围长规则QC-LDPC码的方法。该方法利用Fibonacci-Lucas数列的特殊性质和结构构造移位矩阵，进而通过扩展得到校验矩阵，所构造的码型不仅码长码率可以灵活变化且其校验