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spectral-communication

于 2011-11-18 发布文件大小:9399KB

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扩频通信完整的课件和习题答案，清华经典教材，学习无线移动以及跳频通信的基础(Spread spectrum communication courseware and exercises complete answer, Tsinghua classic textbook, learning, and frequency hopping wireless mobile communication base)

文件列表：

扩频通信课件完整版
..................\第1章.ppt,1516544,2009-07-12
..................\第2章.ppt,1646592,2009-07-12
..................\第3章.ppt,2208768,2009-07-12
..................\第4章.ppt,2001408,2009-07-12
..................\第5章.ppt,2248192,2009-07-12
..................\第6章.ppt,1289728,2009-07-12
..................\第7章.ppt,1609216,2009-07-12

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说明：：载波频率偏移是OFDM系统实现的关键问题之一。分析了OFDM 系统载频偏移估计的2 种算法，即利用循环前缀和训练序列方法。它们均为最大似然估计方法。分别讨论了它们的基本思想、实现方法和仿真结果。可以看出基于循环前缀算法复杂度较小，精度不高，而基于训练序列的算法有较高的估计精度，但降纸了系统传输效率。(Abstract：Carrier frequency ofset is one of the key problems in OFDM system．Two foundational methods 。cycling prefix—based and training sequence—based algorithms。to estimate OFDM carriers~equency ofset are analyzed．Then it discusses their basic thoughts。implementing methods and simulation resuits． Finally。merits and demerits of every algorithm are supposed．It concludes that the cycling prefix— based algorithm has less complexity and less precision。and that the training sequence—based algorithm has better estimation performance at the cost of transmission efficiency．)

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spectral-communication

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