移动通信Issue(14)：83-87,5.DOI:10.3969/j.issn.1006-1010.2015.14.017
基于不同解码类型的8PSK软解调算法研究
Research on 8PSK Soft Demodulation Algorithms Based on Different Types of Decoding
徐红霞 1姚力 1王会林 1施剑1
作者信息
- 1. 中国电子科技集团公司第七研究所，广东 广州 510310
- 折叠
摘要
Abstract
High-order modulation is often adopted in wireless broadband system to enhance spectrum utilization. In addition, error control coding, such as convolutional code or Turbo code is selected to reduce impacts of channel noise and fading. In the process of channel decoding, soft demodulation information is necessary to improve decoding gain. In general, LLR (Log Likelihood Ratio) is used as the output of soft demodulation. LLR is calculated according to classical Euclidean distance decision, but the algorithm suffers from large amounts of computation, long processing time and high implementation cost. In order to solve the problem, the combination of boundary decision with constellation point was designed to calculate LLR. Finally, the performances of the two algorithms were compared and the actual effect was presented.关键词
八进制相移键控/对数似然比/欧式距离/边界判决法/星座点合并法Key words
8 phase shift keying/log likelihood ratio/Euclidean distance/boundary decision/constellation point combination分类
信息技术与安全科学引用本文复制引用
徐红霞,姚力,王会林,施剑..基于不同解码类型的8PSK软解调算法研究[J].移动通信,2015,(14):83-87,5.
