基于无导频法的移动OFDM系统信道估计

2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI:10.1109/ISPACS.2006.364706

Dongguo Li, Katsumi Ymashita

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引用次数: 0

摘要

由于载波间干扰是影响移动OFDM系统传输性能提升的主要障碍，导频辅助技术被认为是一种有效的解决方案，即使需要牺牲一些有效的带宽。另外一些提出的信道估计的盲和半盲方法利用传输数据的某些底层统计特性，使系统变得复杂。本文提出了一种有效的无导频信道估计与均衡方法，该方法不仅能显著减轻信道干扰，提高误码率性能，还能提高系统的传输效率，具有实用性。通过蒙特卡罗仿真，实验结果表明，无导频方法可以达到与已知信道结果相同的性能

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Channel Estimation Based on Pilot-Free Method for Mobile OFDM Systems

Since introduces intercarrier interference (ICI) is the well-known main barrier of upgrading transmission performance for mobile OFDM systems, pilot-aided technique is regarded as the effective solution even some efficient bandwidth has to sacrifice. Some others proposed blind and semi-blind method for the channel estimation utilizes certain underlying statistical properties of the transmitted data make systems becomes complexity. In this paper, an effective channel estimation and equalization method with pilot-free is proposed, which not only can significantly mitigate the ICI and improve the BER performance but also can upgrade the system transmission efficiency, with practicability. According to the Monte Carlo simulations, the empirical results show that our pilot-free method can approach same performance as the known channel results

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2006 International Symposium on Intelligent Signal Processing and Communications

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