Design and analysis of Turbo decoder for Chinese third generation mobile communication system

Author

Li, Xuan ; Song, Wen-tao ; Luo, Han-wen

Author_Institution

Dept. of Electron. Eng., Shanghai Jiaotong Univ., China

Volume

2

fYear

2000

fDate

2000

Firstpage

680

Abstract

This paper presents a short-latency Turbo-codes decoder for the third generation mobile communication system. In the decoder, we employed a modified sliding window log-BCJR (SW-log-BCJR) algorithm in which two sliding windows work in parallel. With this algorithm the decoding latency of Turbo-codes decoder is half reduced and the complexity and memory increment is reasonable. Simulation shows that if we properly choose the size of the sliding window length, the performance degradation of the proposed algorithm is within 0.2 dB at BER=10^-5 relative to BCJR algorithm. Turbo decoder using the proposed algorithms is implemented on single-chip Xilinx FPGA and up to 2 Mbps throughput is reached

Keywords

cellular radio; decoding; field programmable gate arrays; turbo codes; 2 Mbit/s; Turbo decoder; complexity; decoding latency; memory increment; modified sliding window log-BCJR algorithm; performance degradation; single-chip Xilinx FPGA; third generation mobile communication system; throughput; 3G mobile communication; Concatenated codes; Convolutional codes; Degradation; Delay; Field programmable gate arrays; Iterative algorithms; Iterative decoding; Throughput; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on

Conference_Location

Jounieh

Print_ISBN

0-7803-6542-9

Type

conf

DOI

10.1109/ICECS.2000.912969

Filename

912969