Title :
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
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;
Conference_Titel :
Communication Technology and Application (ICCTA 2011), IET International Conference on
Conference_Location :
Beijing
DOI :
10.1049/cp.2011.0622
