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LINGO-program

于 2014-08-19 发布 文件大小:164KB
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  几十个lingo程序,包含linggo的基本用法,用于数学建模中的统计处理问题(Dozens lingo procedures, including basic usage linggo for mathematical modeling of the statistical treatment of the problem)

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    In this paper, we investigate the timing and carrier frequency offset (CFO) synchronization problem in decode and forward cooperative systems operating over frequency selective channels. A training sequence which consists of one orthogonal frequency-division multiplexing (OFDM) block having a tile structure in the frequency domain is proposed to perform synchronization. Timing offsets are estimated using correlation-type algorithms. By inserting some null subcarriers in the proposed tile structure, we propose a computationally efficient subspace decomposition- based algorithm for CFO estimation. The issue of optimal tile length is studied both theoretically and through simulations. By judiciously designing the tile size of the pilot, the proposed algorithms are shown to have better performance, in terms of synchronization errors and bit error rate, than the time-division multiplexing-based training method and the computationally demanding space-alternating generalized expectation-maximization
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    2013-09-04 13:35:26下载
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