一种新的LDPC码编码方法

摘要

为了降低低密度奇偶校验码（ Low Density Parity Check Code， LDPC）的复杂度，减少编码时的存储空间，同时保证LDPC码的性能，提出了一种新的LDPC码的编码方法---模循环方法，并给出了模循环方法产生的校验矩阵中无四环和无六环的充要条件。该方法可以简化编码设计，占用储存空间小，计算复杂度低，其性能达到了IEEE 802�16e中所使用LDPC码的水平，适合在宽带通信中使用。%In order to reduce the computational complexity and memory space of LDPC codes without performance loss, a novel method for LDPC codes is presented, which is so called Module-Cyclic LDPC codes. A necessary and sufficient condition for check matrix without 4-circle and 6-circle for this method is given. The performance and experiment results analysis show that the proposed method with low computational complexity and memory space has the same BER level as the LDPC codes proposed in IEEE 802.16e. It can be concluded that the novel method is suitable for broadband communication systems.