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中文摘要：
提出了一种基于代价函数实现短循环前缀正交频分复用（orthogonal frequency division multiple-xing,OFDM）信号参数融合估计与识别的算法。该算法同时利用OFDM信号循环前缀产生的自相关和循环自相关特性,同步估计有用符号时间和符号周期。首先对OFDM信号的循环自相关特性进行了深入的分析,然后构造了代价函数并讨论了时变衰落信道条件下引入循环频率的数目对代价函数的影响,最后通过计算机仿真,验证了算法的有效性。
英文摘要：
A merging parameters estimation and identification algorithm for short cyclic prefix orthogonal frequency division multiplexing（OFDM） signals is presented based on cost function.Merging estimation of the useful symbol time and symbol duration for OFDM signals can be realized with the algorithm by using the autocorrelation and the cyclic autocorrelation simultaneously,which are generated by the cyclic prefix of OFDM signals.Firstly the characteristic of cyclic autocorrelation for OFDM signals is deeply analyzed.Then a cost function is constructed,and the effects of the cost function by introducing the number of the cycle frequency are discussed in the time-varying fading channels.Finally,the validity of the algorithm is proved by simulations.
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