An Efficient NB-LDPC Decoder Architecture for Space Telecommand Links

In the framework of error correction in space telecommand (TC) links, Consultative Committee for Space Data Systems (CCSDS) currently recommends short block-length BCH and binary low-density parity-check (LDPC) codes. Other alternatives have been discarded due to their high decoding complexity, such as non-binary LDPC (NB-LDPC) NB-LDPC codes perform better than counterparts over AWGN jamming channels, being great candidates communications. We show feasibility coding TC applications by proposing a highly efficient architecture. The proposed decoder is implemented (128,64) code GF(16) design particularized space-certified Virtex-5QV FPGA. results prove that an alternative outperforms standardized LDPC, with gain 0.7 dB at reasonable implementation cost. Given maximum rate recommended CCSDS 2 Mbps, architecture achieves throughput 2.03 Mbps using only 9615 LUTs 5637 FFs (no dedicated memories are used). addition, this suitable any regular (2,4) independently H matrix, allowing flexibility choice code. This brief places excellent future versions uplink standard.