| 基于PSAM的OFDM系统仿真及性能分析 |
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| 引用本文： | 成茂荣,张向东,秦怀宝,沈若骋.基于PSAM的OFDM系统仿真及性能分析[J].计算机仿真,2008,25(8). |
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| 作者姓名： | 成茂荣 张向东 秦怀宝 沈若骋 |
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| 作者单位： | 1. 西安电子科技大学智能交通研究所,陕西,西安,710071
2. 西安电子科技大学ISN国家重点实验室信息科学研究所,陕西,西安,710071 |
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| 摘 要： | 为了分析信道估计和循环前缀对提高正交频分复用(OFDM)系统性能的具体作用.首先简要介绍了OFDM基本原理,然后在理想同步情况下,重点分析了循环前缀(CP)和信道估计算法对OFDM系统性能的影响.在给出OFDM系统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真.最后给出在不同的信道条件下,循环前缀(CP)和信道估计算法对OFDM系统误码率影响的比较曲线.从仿真曲线可以看出:高斯信道下循环前缀的作用并不显著,因为这时没有信道时延,也就不会产生ISI;但是当存在多径瑞利信道的时候cp的作用就显得很重要;MMSE估计法明显优于LS估计法.得出理想结论.
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| 关 键 词： | 正交频分复用 仿真 循环前缀 信道估计 |
Simulation and Performance Analysis of PSAM-Based OFDM System |
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| CHENG Mao-rong,ZHANG Xiang-dong,QIN Huai-bao,SHEN Ruo-cheng.Simulation and Performance Analysis of PSAM-Based OFDM System[J].Computer Simulation,2008,25(8). |
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| Authors: | CHENG Mao-rong ZHANG Xiang-dong QIN Huai-bao SHEN Ruo-cheng |
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| Affiliation: | CHENG Mao-rong1,ZHANG Xiang-dong 1,QIN Huai-bao1,SHEN Ruo-cheng2(1.Institute of ITS,Xidian University,Xi'an Shanxi 710071,China,2.Information Science Institute,State Key Laboratory of ISN,China) |
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| Abstract: | In order to analyze the basic functions of Channel estimation and CP to improve the performance of the OFDM system,in this article,OFDM basic principle is briefly introduced,then,the influence of CP and different channel estimation on the system performance is emphatically analyzed in the condition of ideal synchronization.Besides,based on the given system model,the OFDM system is simulated.Finally,the BER curves of CP and channel estimation are given and compared.The curves of simulation show that: the ben... |
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| Keywords: | Orthogonal frequency division multiplexing(OFDM) Simulation CP Channel estimation |
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