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提出了一种适合于WIMAX标准的所有码长和码率LDPC码的编码器结构,充分利用了校验矩阵的特点降低硬件实现复杂度.设计了一种基于TDMP-NMS算法的码长码率均可配置的支持连续译码的LDPC码译码器,支持该标准中所有码长和码率LDPC码的译码,通过仿真得出了在保证译码器误码率性能前提下的最优量化比特位宽和各码率的最优归一化因子.采用一种新的适合于TDMP算法的动态迭代停止准则,结果表明,所采用的方案有效降低了译码器的资源消耗,提高了吞吐率.
An encoder structure suitable for all code length and bit rate LDPC codes of WIMAX standard is proposed, which makes full use of the characteristics of parity check matrix to reduce the complexity of hardware implementation.A code length code rate based on TDMP-NMS algorithm is designed. Can be configured to support continuous decoding of LDPC code decoder to support the standard code length and code rate LDPC decoding, simulation results obtained under the premise of the decoder bit error rate performance under the premise Quantization bit width and the optimal normalization factor of each bit rate.A new dynamic iterative stopping criterion suitable for TDMP algorithm is proposed.The results show that the proposed scheme can effectively reduce the resource consumption of the decoder and improve Throughput.