Research Article
An ASIC Fast Decoder of Rate Compatible Modulation and Its Application in Wireless Communication System
@INPROCEEDINGS{10.1007/978-3-319-52730-7_34, author={Wei Yu and Jun Wu and Hao Cui and Zhifeng Zhang and Haoqi Ren}, title={An ASIC Fast Decoder of Rate Compatible Modulation and Its Application in Wireless Communication System}, proceedings={Machine Learning and Intelligent Communications. First International Conference, MLICOM 2016, Shanghai, China, August 27-28, 2016, Revised Selected Papers}, proceedings_a={MLICOM}, year={2017}, month={2}, keywords={ASIC Decoder BP Communication Spectrum efficiency}, doi={10.1007/978-3-319-52730-7_34} }- Wei Yu
Jun Wu
Hao Cui
Zhifeng Zhang
Haoqi Ren
Year: 2017
An ASIC Fast Decoder of Rate Compatible Modulation and Its Application in Wireless Communication System
MLICOM
Springer
DOI: 10.1007/978-3-319-52730-7_34
Abstract
Rate Compatible Modulation (RCM) is a new rate adaptation scheme in wireless communication system, which can achieve very high spectrum efficiency both in additive white Gaussian noise (AWGN) channel and fading channel. But the high decoding complexity of RCM hinders its application in practical communication systems. This paper introduces an Application Specific Integrated Circuit (ASIC) based fast decoder of RCM to implement belief propagation (BP) algorithm in logarithm domain. Though BP algorithm has natural parallel characteristic, a partial-parallel full-pipelined architecture is designed to achieve a tradeoff between hardware resource and processing speed. In order to reduce the computing complexity and improve the throughput of the decoder, we adopt some reduced algorithms, such as piecewise function approximation, lookup tables, fixed-point computing and etc. We build a communication system to test our ASIC decoder in AWGN channel and IEEE 802.11a fading channel.