OFDM系统频率和时间估计的循环平稳实现 |
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引用本文: | 崔小准,陈豪,胡光锐.OFDM系统频率和时间估计的循环平稳实现[J].通信技术,2003(3):44-45. |
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作者姓名: | 崔小准 陈豪 胡光锐 |
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作者单位: | 1. 上海交通大学,上海,200030 2. 西安空间无线电技术所,西安,710000 |
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基金项目: | 国家自然科学基金资助项目(60172018) |
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摘 要: | 提出了一个用于频率选择性衰落信道中传输的正交频分多路(OFDM)的定时和频率联合估计的算法。这种估计器利用了接收信号的二阶循环特性,而且不需要信道冲激响应的信息。计算机仿真表明,采用所提出的方案能显著地提高估计器的性能。
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关 键 词: | 循环平稳特性 正交频分多路 频率估计 定时估计 |
修稿时间: | 2002年9月24日 |
A Cyclonstationary Approach for Joint Estimation of Frequency and Time in OFDM System |
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Abstract: | In this paper,a blind estimation alg orithm is developed for estimating j ointly timing and frequency offset o f Orthogonal frequency division multiplexing(OFDM)signals transmitted through a frequ ency -selective fading channel.The pro-posed estimator exploits the second-order cyclostationarity of receiv ed signals and does not require the in formation of impulse response of channel.The results show a significant performance improvement when using the scheme presented in this paper through computer simulation. |
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Keywords: | cyclostationarity orthogonal frequency division mult iplexing estimation of frequeng e stimeation of time |
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