A 5.79-Gb/s Energy-Efficient Multirate LDPC Codec Chip for IEEE 802.15.3c Applications

作者：Yen Shao Wei^*; Hung Shiang Yu; Chen Chih Lung; Chang Hsie Chia; Jou Shyh Jye; Lee Chen Yi

来源：IEEE Journal of Solid-State Circuits, 2012, 47(9): 2246-2257.

DOI：10.1109/JSSC.2012.2194176

• IEEE 802.15.3c
• low-density parity-check (LDPC) codes
• row-based layered scheduling

An LDPC codec chip supporting four code rates of IEEE 802.15.3c applications is presented. After utilizing row-based layered scheduling, the normalized min-sum (NMS) algorithm can reduce half of the iteration number while maintaining similar performance. According to the unique code structure of the parity-check matrix, a reconfigurable 8/16/32-input sorter is designed to deal with LDPC codes in four different code rates. Both sorter input reallocation and pre-coded routing switch are proposed to alleviate routing complexity, leading to 64% input reduction of multiplexers. In addition, an adder-accumulator-shift register (AASR) circuit is proposed for the LDPC encoder to reduce hardware complexity. After implemented in 65-nm 1P10M CMOS process, the proposed LDPC decoder chip can achieve maximum 5.79-Gb/s throughput with the hardware efficiency of 3.7 Gb/s mm(2) and energy efficiency of 62.4 pJ/b, respectively.

• 出版日期2012-9