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Mobile Information Systems
Volume 2016 (2016), Article ID 7048482, 6 pages
Research Article

LDPC Decoding on GPU for Mobile Device

School of Electronic and Information Engineering, South China University of Technology, Tianhe District, Guangzhou, China

Received 17 May 2016; Revised 17 August 2016; Accepted 25 August 2016

Academic Editor: Mariusz Głąbowski

Copyright © 2016 Yiqin Lu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A flexible software LDPC decoder that exploits data parallelism for simultaneous multicode words decoding on the mobile device is proposed in this paper, supported by multithreading on OpenCL based graphics processing units. By dividing the check matrix into several parts to make full use of both the local memory and private memory on GPU and properly modify the code capacity each time, our implementation on a mobile phone shows throughputs above 100 Mbps and delay is less than 1.6 millisecond in decoding, which make high-speed communication like video calling possible. To realize efficient software LDPC decoding on the mobile device, the LDPC decoding feature on communication baseband chip should be replaced to save the cost and make it easier to upgrade decoder to be compatible with a variety of channel access schemes.