星上固態存儲中高速BCH編解碼器設計

Abstract

針對宇宙輻射對星上大容量固態記憶體存在單粒子效應，設計並在FPGA(Field Programmable Gate Array)上實現了一種高速率、高效率的BCH碼編解碼器。在編碼器方面，提出了基於展開(unfolding)演算法的8路並行編碼結構，獲得了近800Mbps的吞吐量，硬體資源下降到傳統並行編碼器的1/8；在解碼器方面，繼承了脈動陣列的思想，提出了並行度為8的解碼結構，獲得了260Mbps的吞吐量，解碼延時降為串列結構的1/8。Because of the existing of single-event effects for mass solid state recorder in satellite due to space radiation, a BCH codec is designed and implemented in FPGA (Field Programmable Gate Array) with high speed and high efficiency. On the aspect of encoder, an 8-parallel BCH encoder architecture based on unfolding algorithm is proposed, which achieves the throughput of 800Mbps, while the scale of hardware can be reduced to 1/8 of that with the traditional serial encoder architecture; on the aspect of decoder, an 8-parallel decoder architecture inheriting the basic idea of systolic array is proposed to achieve the throughput of 260Mbps, while the decoding latency can be reduced to 1/8 comparing with the traditional serial decoder architecture.