An Efficient Hardware LDPC Encoder Based on Partial Parallel Structure for CCSDS
Zhaohui Wang, Xin Jie Hao, Changxing Lin, Qiuyu Wu · 2018
This paper proposes a partial parallel structure for the Low Density Parity Check (LDPC) encoder, the design is capable for (5120,4096) LDPC code for Consultative Committee for Space Data Systems (CCSDS) standard. A low complexity clclic shifter are designed for reducing the hardware cost due to the Quasi-Cyclic nature of the generator matrix. The generator matrix was divided into systematic part and parity check part, the code in the systematic part is the same as the input code, the parity check part divied into 32×16 submatrices, each submatrix is quasi-cyclic with the size 128×64. After 128 clocks, the encoded process finished, and 8Gbps throughput is achieved at 200MHz clock frequency with acceptable resource consumption.