An improved SOVA algorithm and DSP implementation for turbo codes decoding

被引：0
|
作者：
Xie, RH [1 ]
Sun, JT [1 ]
Guo, SH [1 ]
Rui, YB [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing, Peoples R China
来源：
2004 7TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS, VOLS 1-3 | 2004年
关键词：
turbo codes; SOVA; decoding algorithm DSP;
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
SOVA has been a practical decoding algorithm for Turbo-codes due to its low complexity and low latency of decoding. However. inaccuracy of soft-decision Output could lower the performance of SOVA. In this paper we propose a modified SOVA by incorporating a corrective function to improve the accuracy of soft decision output. The simulation results show that the modified corrective SOVA algorithm achieves significant performance improvement without the increase of decoding complexity. Implementation of the improved algorithm on DSP is investigated by examining the effects of the degree of quantization and the finite word length on the performance. and speed, as well as memory storage requirement of decoding.
引用
收藏
页码：1873 / 1877
页数：5
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