一种星载高速并行LDPC编码方法

A Spaceborne High⁃Speed Parallel LDPC Encoding Method

随着卫星遥感技术的高速发展,低密度奇偶校验(LDPC)编码器必须实时完成各类载荷海量数据的纠错处理,传统串行LDPC编码方式已经不能满足高速处理需求,为此开展了新一代星载高速LDPC编码方案设计。基于CCSDS标准推荐用于低轨卫星通信的7/8码率LDPC,巧妙利用信息bit和生成矩阵扩充方式,设计了一种扩充并行LDPC编码方法,并在V5 FPGA上实现,与现有并行编码方案相比,提高了3%处理速度,减少了50%时钟资源、100%存储资源、18%逻辑资源,并应用在了新一代遥感卫星上。

With the rapid development of satellite remote sensing technology,the encoder of Low⁃density parity⁃check codes must complete the error correction of mass date of various payloads in real time.The traditional serial encoding method can no longer satisfy the high speed processing.Therefore,a new generation encoder of high speed LDPC is designed.Based on the low orbit satellite communication LDPC of CCSDS recommendation,It is designed a parallel encoding method by the clever use of information bit and matrix expansion,and the successful implementation in V5 FPGA,compared with the existing parallel encoding,improves the processing speed of 3%,a decrease of resources of 50%clock、100%storage and18%logic.The encoder has been applied to a new generation of remote sensing satellites.