High-Throughput LDPC-Decoder Architecture Using Efficient Comparison Techniques & Dynamic Multi-Frame Processing Schedule
Architecture of block-level-parallel layered decoder for irregular LDPC code. It can be recon?gured to support various block lengths and code rates of IEEE 802.11n (Wi Fi) wireless-communication standard. We have proposed efficient comparison techniques for both column and row layered schedule and rejection-based high-speed circuits to compute the two minimum values from multiple inputs required for row layered processing of hardware-friendly min-sum decoding algorithm. The results show good speed with lower area as com- pared to state-of-the-art circuits. Additionally, this work proposes dynamic multi-frame processing schedule which efficiently utilizes the layered-LDPC decoding with minimum pipeline stages. The suggested LDPC-decoder architecture has been synthesized and post-layout simulated in 90 nm-CMOS process. This decoder occupies 5.19 mm2 area and supports multiple code rates like 1/2, 2/3, 3/4 & 5/6 as well as block-lengths of 648, 1296 & 1944. At a clock frequency of 336 MHz, the p roposed LDPC-decoder has achieved better throughput of 5.13 Gbps and energy effiiciency of 0.01 nJ/bits/iterations, as compared to the similar state-of-the-art works.
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This product was added to our catalog on Wednesday 07 September, 2016.