A Low-Power LDPC Decoder for Multimedia Wireless Sensor Networks

Meng XU  Xincun JI  Jianhui WU  Meng ZHANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E96-B   No.4   pp.939-947
Publication Date: 2013/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.939
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Fundamental Theories for Communications
Keyword: 
LDPC,  Multimedia Wireless Sensor Networks,  low power design,  layered decoding,  memory bypassing scheme,  Benes network,  

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Summary: 
This paper presents a low-power LDPC decoder that can be used in Multimedia Wireless Sensor Networks. Three low power design techniques are proposed in the decoder design: a layered decoding algorithm, a modified Benes network and a modified memory bypassing scheme. The proposed decoder is implemented in TSMC 0.13 µm, 1.2 V CMOS process. Experiments show that when the clock frequency is 32 MHz, the power consumption of the proposed decoder is 38.4 mW, the energy efficiency is 53.3 pJ/bit/ite and the core area is 1.8 mm2.