基于BP算法的QC_LDPC译码器的DSP实现

The DSP implementation of QC_LDPC decoder based on BP algorithm

为了克服LDPC码BP译码算法硬件实现复杂度大的缺点,针对QC_LDPC码校验矩阵的结构特性,研究了BP算法的特点,并利用TMS320C6747系列DSP作为实现平台,在硬件资源存储、数据精度处理方面提出了改进,成功实现了基于BP算法的QC_LDPC码译码器.系统性能测试表明,经优化的BP算法译码器与理论分析相比,性能基本一致.

In order to overcome the shortcomings of the high complexity in hardware implementation of the BP decoding algorithm＇s hardware implementation,the characteristics of the BP algorithm were studied,in view of the structural properties of the QC_LDPC code check matrix.And the TMS320C6747 DSP were used for the implementation,some improvements about the hardware memory and the disposing of data precision was proposed, and the implementation of the QC_LDPC decoder based on the BP algorithm was completed in the end.The system tests results shows that the performance of the optimized BP algorithm decoder is almost the same to the theoretic analysis.