Efficient approximate layered LDPC decoder
Yangcan Zhou, Jun Ting Lin, Zhongfeng Wang · 2017
Energy efficient and high throughput LDPC decoders are highly demanded, especially in the coming 5-th generation (5G) mobile communication era. In this paper, to the best of our knowledge, approximate computing units (ACUs) for the update of soft messages in row layered LDPC decoders are proposed for the first time. Under the TSMC 90nm CMOS technology, the synthesis results demonstrate that for typical LDPC codes employed in industrial standards, the corresponding ACUs achieve significant reduction in critical path delay (CPD), area and energy consumption. Numerical results show that the presented ACUs cause negligible degradation in the error-correction performance.