Large-circle-length quasi-cyclic semi-random LDPC code design method and system

The invention belongs to the technical field of coding, and discloses a large-circle-length quasi-cyclic semi-random LDPC (Low Density Parity Check) code design method. According to the invention, by designing the LDPC codes of which the circle lengths are not less than 8 and 10, the fault-tolerant capability to noise and channel interference is enhanced, so that the reliability and performance of a communication system are improved. By encoding, the original data is converted into encoded words containing redundant information, which enables a receiving end to detect and correct errors caused by channels. 本发明属于编码技术领域，公开了一种大圈长准循环半随机LDPC码设计方法。本发明通过设计圈长不小于8和10的LDPC码，增强对噪声和信道干扰的容错能力，从而提高通信系统的可靠性和性能。通过编码，原始数据被转换为编码字，其中包含了冗余信息，这使得接收端能够检测和纠正由信道导致的错误。