基于信道预测的协作中继选择方法

doi:10.11772/j.issn.1001-9081.2015.09.2419

计算机应用 ›› 2015, Vol. 35 ›› Issue (9): 2419-2423.DOI: 10.11772/j.issn.1001-9081.2015.09.2419

基于信道预测的协作中继选择方法

覃彩玲, 肖琨

广西师范大学电子工程学院, 广西桂林 541004

收稿日期:2015-04-24 修回日期:2015-06-04 出版日期:2015-09-10 发布日期:2015-09-17
通讯作者: 肖琨(1974-),男,湖南邵阳人,副教授,博士,主要研究方向:协同通信、移动衰落信道,xiaokun@gxnu.edu.cn
作者简介:覃彩玲(1989-),女,广西贵港人,硕士研究生,主要研究方向:协同通信、信道预测
基金资助:
国家自然科学基金资助项目(61362015);广西自然科学基金资助项目(2014GXNSFAA118397);广西无线宽带通信与信号处理重点实验室开放基金资助项目(GXKL0614202);广西研究生教育创新计划项目(YCSZ2015098)。

Cooperative relay selection method based on channel prediction

QIN Cailing, XIAO Kun

College of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004, China

Received:2015-04-24 Revised:2015-06-04 Online:2015-09-10 Published:2015-09-17

摘要/Abstract

摘要： 一般的协作中继选择方法利用过时的信道状态信息(CSI)进行中继选择,准确的信道预测能提供精确的CSI用于中继选择。已有的信道预测方法往往不能适应信道的快时变性,或者具有高复杂度。为此提出一种基于斜率预测的信道预测方法,并应用于协作通信系统的中继选择中。该预测方法结合一阶线性多项式曲线拟合和有限脉冲响应(FIR)维纳预测,使用FIR维纳预测器预测信道一阶线性函数的斜率,将预测范围切割成若干个足够小的时间片段,在这些小的时间片段内对信道进行连续预测。同时,提出了基于信道预测的中继选择(CPRS)方法,并进行了性能分析。仿真表明,与基于过时信道的中继协作(OCRS)通信系统相比,CPRS能使系统的误码率(BER)下降幅度达到13%~63%,具有显著的性能提升效果。

关键词: 协作通信, 时变信道, 信道预测, 线性拟合, 维纳预测, 中继选择

Abstract: Common cooperative relay selection used outdated Channel State Information (CSI) to select relay, and accurate channel prediction can provide precise CSI for relay selection. The existing channel prediction methods often cannot adapt to the rapidly time-varying channel, or with high complexity. Therefore a channel prediction method based on slope prediction was proposed, which was applied to relay selection for cooperative communication system. This channel prediction method combined first-order linear polynomial curve fitting with Finite Impulse Response (FIR) Wiener prediction, by using FIR Wiener predictor to predict the slope of channel first-order linear function, cut the prediction range into several small enough time slices, and implemented continuous channel prediction within these small segments of time. At the same time, the Channel-Prediction based Relay Selection (CPRS) method was proposed, and performance analysis was carried out. Simulation results show that in the comparison experiments with the coordination system of Outdated-Channel based Relay Selection (OCRS), CPRS can make the system Bit Error Ratio (BER) decline 13% to 63%, with significant performance improvement effect.

Key words: cooperative communication, time-variant channel, channel prediction, linear fitting, Wiener prediction, relay selection

中图分类号:

TN911.23

覃彩玲, 肖琨. 基于信道预测的协作中继选择方法[J]. 计算机应用, 2015, 35(9): 2419-2423.

QIN Cailing, XIAO Kun. Cooperative relay selection method based on channel prediction[J]. Journal of Computer Applications, 2015, 35(9): 2419-2423.

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基于信道预测的协作中继选择方法

Cooperative relay selection method based on channel prediction

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