Modification of branch metric calculation to improve iterative SOVA decoding of turbo codes

被引：8

作者：

Papaharalabos, S ^{[1
]}

Sweeney, P ^{[1
]}

Evans, BG ^{[1
]}

机构：

[1] Univ Surrey, CCSR, Guildford GU2 5XH, Surrey, England

来源：

ELECTRONICS LETTERS | 2003年 / 39卷 / 19期

关键词：

D O I：

10.1049/el:20030893

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

It is known that the performance of a SOVA (soft output Viterbi algorithm) turbo decoder can be improved, as the extrinsic information that is produced at its output is over-optimistic. A new parameter associated with the branch metrics calculation in the standard Viterbi algorithm is introduced that affects the turbo code performance. Different parameter values show a simulation improvement in the AWGN channel as well as in an uncorrelated Rayleigh fading channel. By choosing the best value of this parameter, a coding gain improvement of 0.25 dB at BER of 10(-5) is achieved compared to existing schemes.

引用

页码：1391 / 1392

页数：2