A Scalable Decoder Architecture for IEEE 802.11n LDPC Codes

Abstract

This paper describes a scalable IP of a decoder for LDPC codes compliant to IEEE 802.1 In and running the well- known layered decoding algorithm. The decoder architecture is arranged in clusters of serial processing units, which are configurable to process all the codes in the standard and, at the same time, to support multiple frame decoding. An optimization methodology of the iteration latency is also described, which relates to the order of the messages updated by the processors, as well as to the sequence of layers the decoder goes through. The logic synthesis on 65 nm CMOS technology with low- power standard-cell library, shows that the proposed design is suitable for portable devices, the throughput ranging from 180 to 410 Mbps, and the power consumption being below 235 mW.