Low Complexity Non Iterative Soft Decision BCH Decoder Architecture for WBAN Applications
This paper presents a low complexity non iterative soft decision Bose Chaudhuri Hocquenghem (SD BCH) decoder architecture and design technique for wireless body area networks (WBANs) A SDBCH decoder with test syndrome computation, a syndrome calculator, Chien search and metric check, and error location decision is proposed. The proposed SD BCH decoder not only uses test syndromes, but also does not have an iteration process. The proposed SD BCH decoder provides a 0.75~1 dB coding gain compared to a hard decision BCH (HD BCH) decoder, and almost similar coding gain compared to a conventional SD BCH decoder. The proposed SD BCH (63, 51) decoder was designed and implemented using 90 nm CMOS standard cell technology. Synthesis results show that the proposed non iterative SD BCH decoder using a serial structure can lead to a 75% reduction in hardware complexity and a clock speed 3.8 times faster than a conventional SD BCH decoder.