LDPC Decoding on GPU for Mobile Device

Abstract

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.

Parallel Algorithm for Wireless Data Compression and Encryption

“…In the field of wireless communication, we have tested the speed of RSA in an embedded platform of STM32 in [16]. And we have tested the acceleration of LDPC decoding with a mobile phone GPU of PowerVR in [17]. However, to inspect the abilities of CZ-BEEM, we need more research works and experiment results.…”