An efficient multi-rate LDPC-CC decoder with layered decoding algorithm

Abstract

An efficient multi-rate Low-Density Parity-Check Convolutional Code decoder will be present in this paper. We will introduce layered decoding algorithm into LDPC-CC decoding. Simulation results shows that our method can achieve better performance than the original brief propagation algorithm with less processors. Besides a new ASIC architecture which adopt proposed algorithm and can support all code rate (1/2, 2/3, 3/4, 4/5) of the LDPC-CC code in IEEE 1901 is proposed. Based on SMIC 130 nm CMOS process, our decoder attaints a maximum throughput of 333.3 Mb/s at 200 MHz. The core area is 3.55 mm 2 with 10 processors. The average power consumption is 262 mW at code rate 4/5 and 200 MHz. The VLSI result shows that our decoder is both memory efficient and area efficient.