Performance of OFDM Systems with Residual Carrier Frequency Offset over Time-varying Rayleigh Channels

2006 IEEE Information Theory Workshop - ITW '06 Chengdu Pub Date : 2006-10-01 DOI:10.1109/ITW2.2006.323687

Guangfa Dai, Hongwen Tang, Shaoping Chen

{"title":"Performance of OFDM Systems with Residual Carrier Frequency Offset over Time-varying Rayleigh Channels","authors":"Guangfa Dai, Hongwen Tang, Shaoping Chen","doi":"10.1109/ITW2.2006.323687","DOIUrl":null,"url":null,"abstract":"In this paper, the performance of orthogonal frequency division multiplexing (OFDM) systems with residual carrier frequency offset over time-varying Rayleigh channels is investigated. The power of different received signal components (the desired signal, the ICI signals caused by frequency offset and channel variations, and noise signals) are first calculated and analyzed, and the SINR (signal to interference plus noise ratio) and BER (bit error rates) calculations for 16-QAM OFDM systems are then investigated. Analytical analysis and computer simulations show the following important results: (1) residual frequency offset and channels' time variations greatly degraded the performance of OFDM systems; (2) the intercarrier interference (ICI) energy caused by channel variations or frequency offset is concentrated in cyclically adjacent subcarriers, which is important for developing low complexity ICI cancellation techniques; (3) the influence of residual carrier frequency offset on OFDM system performance can be modeled as the effects of equivalent channels' time variations, and a time-varying channel model including the residual carrier frequency offset effect is proposed","PeriodicalId":299513,"journal":{"name":"2006 IEEE Information Theory Workshop - ITW '06 Chengdu","volume":"32 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 IEEE Information Theory Workshop - ITW '06 Chengdu","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ITW2.2006.323687","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 4

Abstract

In this paper, the performance of orthogonal frequency division multiplexing (OFDM) systems with residual carrier frequency offset over time-varying Rayleigh channels is investigated. The power of different received signal components (the desired signal, the ICI signals caused by frequency offset and channel variations, and noise signals) are first calculated and analyzed, and the SINR (signal to interference plus noise ratio) and BER (bit error rates) calculations for 16-QAM OFDM systems are then investigated. Analytical analysis and computer simulations show the following important results: (1) residual frequency offset and channels' time variations greatly degraded the performance of OFDM systems; (2) the intercarrier interference (ICI) energy caused by channel variations or frequency offset is concentrated in cyclically adjacent subcarriers, which is important for developing low complexity ICI cancellation techniques; (3) the influence of residual carrier frequency offset on OFDM system performance can be modeled as the effects of equivalent channels' time variations, and a time-varying channel model including the residual carrier frequency offset effect is proposed

查看原文本刊更多论文

时变瑞利信道中残余载波频偏OFDM系统的性能

本文研究了具有残余载波频偏的正交频分复用(OFDM)系统在时变瑞利信道中的性能。首先计算和分析了不同接收信号分量(期望信号、由频偏和信道变化引起的ICI信号以及噪声信号)的功率，然后研究了16-QAM OFDM系统的信噪比(SINR)和误码率(BER)的计算。分析和计算机仿真结果表明:(1)剩余频偏和信道时间变化极大地降低了OFDM系统的性能;(2)信道变化或频偏引起的载波间干扰(ICI)能量集中在周期相邻的子载波上，这对开发低复杂度的载波间干扰消除技术具有重要意义;(3)剩余载波频偏对OFDM系统性能的影响可以建模为等效信道的时变效应，并提出了包含剩余载波频偏效应的时变信道模型

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2006 IEEE Information Theory Workshop - ITW '06 Chengdu

自引率

0.00%

发文量