to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要：為了減小正交頻分復(fù)用系統(tǒng)受頻率偏差的影響，在ofdm系統(tǒng)中設(shè)計了一種新的載波頻偏估計算法自拍灌醉迷j系列在线观看。頻偏估計包括跟蹤和捕獲兩個階段全免费a级毛片100部费观看，文中采用變步長自適應(yīng)算法來進行跟蹤，這個跟蹤算法的捕捉范圍是整個信號帶寬的一半人人操人人舔久久舔。通過此方法，不但可以利用前向糾錯的方式來避免反饋美女视频黄都是全免费的色欲，而且可以縮減復(fù)數(shù)乘法的次數(shù)以降低計算復(fù)雜度和系統(tǒng)功耗啊～好痛别进去了啊视频。該方法運算復(fù)雜度低，并具有較好的收斂性888888.网站男人的天堂，能改善odfm的解調(diào)性能国产日韩91。從計算機的仿真效果可以看出無論是在awgn信道上還是在多徑信道上都表現(xiàn)出了卓越的性能。

Radar detection range estimation ; convex model ; interval analysis ; uncertainty ; Taylor series

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Cent of these the measure that prevent bogus are 3 levels: 4 of 趡 level need range estimation only or feeling can be differentiated, it is the handiest groovy method; that the public differentiates 3 kinds of technologies of the 2nd level need to pass magnifier or ultraviolet lamp detector differentiates; three-layer face needs to pass special apparatus, basically publish administration department to use for news.

這些防偽措施分為3個層面：第~層面的 4項只需目測或觸摸即可鑒別东北老妓女叫床粗话对白，是公眾鑒別的最簡便的常規(guī)辦法；第二層面的3種技術(shù)需要通過放大鏡或紫外燈檢測器鑒別欧美黑人大战白妞；第三層面需要經(jīng)過特殊儀器亚洲中文字幕超碰无码资源，主要供新聞出版行政管理部門使用。

Interquartile range：四分位距

Interpolation, 內(nèi)插法 | Interquartile range, 四分位距 | Interval estimation, 區(qū)間估計

estimation point：估計點

estimation of time 時間估計 | estimation point 估計點 | estimation range 估計范圍

vector representation of signals：信號的矢量表示

user equivalent range error (UERE) 用戶等效距離誤差(UERE) | vector representation of signals 信號的矢量表示 | velocity estimation 速度估算