A high speed turbo decoder implementation for CPU-based SDR system

Author

Lin Huang ; Yajuan Luo ; Hao Wang ; Feng Yang ; Zhenning Shi ; Daqing Gu

Author_Institution

Wireless Commun. Group, Orange Labs., Beijing, China

fYear

2011

fDate

14-16 Oct. 2011

Firstpage

19

Lastpage

23

Abstract

More and more CPU-based SDR systems appear in recent two years. Such system requires high speed real-time signal processing. In this paper, we present our effort on the speed optimization of Turbo decoder, the most computation-demanding module in all baseband modules. We jointly consider the algorithm parallelism and the processor architecture. Single Instruction Multiple Data (SIMD) instruction is used for software implementation. The evaluation results show that this proposed design can achieve a maximum of 124 Mbps throughput for single Soft Input Soft Output (SISO) module with Max-Log-MAP algorithm.

Keywords

MIMO communication; maximum likelihood estimation; signal processing; software radio; telecommunication computing; turbo codes; CPU-based SDR system; SIMD instruction; baseband module; bit rate 124 Mbit/s; computation-demanding module; high speed real-time signal processing; high speed turbo decoder implementation; max-log-MAP algorithm; processor architecture; single SISO module; single instruction multiple data instruction; single soft input soft output module; software-defined radio; speed optimization; CPU-based SDR; MAP algorithm; SIMD optimization; Turbo decoder;

fLanguage

English

Publisher

iet

Conference_Titel

Communication Technology and Application (ICCTA 2011), IET International Conference on

Conference_Location

Beijing

Type

conf

DOI

10.1049/cp.2011.0622

Filename

6192818