OFDM系统与基于梳式导频的MMSE信道估计的性能比较研究

Q4 Computer Science

International Journal of Computer Science and Applications Pub Date : 2013-12-31 DOI:10.5121/IJCSA.2013.3605

Touhidul Islam A.Z.M

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引用次数: 1

摘要

本文对无线正交频分复用(OFDM)系统与基于梳状导频的信道估计算法在频率选择性多径衰落信道上的性能进行了比较分析。采用最小均方误差(MMSE)方法对导频信道进行估计。为了估计数据频率下的信道，采用了低通、线性和二阶插值等不同的插值技术。利用Matlab对OFDM系统进行仿真，分析了不同信号映射(BPSK、QPSK、4QAM、16QAM和64QAM)和信道(瑞利和瑞利)条件下的误码率(BER)性能。研究了信道抽头数的选择对误码率性能的影响。

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A Comparative Performance Study of OFDM System with the Implementation of Comb Pilot-Based MMSE Channel Estimation

This paper presents a comparative performance analysis of wireless orthogonal frequency division multiplexing (OFDM) system with the implementation of comb type pilot-based channel estimation algorithm over frequency selective multi-path fading channels. The Minimum Mean Square Error (MMSE) method is used for the estimation of channel at pilot frequencies. For the estimation of channel at data frequencies different interpolation techniques such as low-pass, linear, and second order interpolation are employed. The OFDM system simulation has been carried out with Matlab and the performance is analyzed in terms of bit error rate (BER) for various signal mapping (BPSK, QPSK, 4QAM, 16QAM, and 64QAM) and channel (Rayleigh and Rician) conditions. The impact of selecting number of channel taps on the BER performance is also investigated.

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来源期刊

International Journal of Computer Science and Applications Computer Science-Computer Science Applications

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0.00%

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期刊介绍： IJCSA is an international forum for scientists and engineers involved in computer science and its applications to publish high quality and refereed papers. Papers reporting original research and innovative applications from all parts of the world are welcome. Papers for publication in the IJCSA are selected through rigorous peer review to ensure originality, timeliness, relevance, and readability.