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中文摘要：
提出了一种新的无线信道下基于循环前缀的正交频分复用系统符号定时同步算法．该算法把连续数据流分成独立的块，通过对间隔FFT长度的两个块求相关和得到符号定时同步和粗载波频偏信息．推导了高斯噪声信道下的归一化定时度量的分布，进而得到了定时错误概率，结果表明该算法具有很好的健壮性．仿真结果表明在多径信道下新算法比传统的符号同步算法稳定性更好．
英文摘要：
A symbol timing algorithm for orthogonal frequency division multiplexing （OFDM） systems with the cyclic prefix under wireless channels is proposed. The continuous data were derided into unattached blocks. And the sum of the correlation of each pair of blocks with fast Fourier transform （FFT） length was used by this algorithm to obtain the symbol timing information. This paper derived the distribution of the normalized timing metric under additive white gauss noise （AWGN） channels. Based on it, the timing error probability is determinate, which illustrates the good robustness of this method. Also, simulation result showed that the proposed algorithm works more stable than the con- ventional maximum likelihood ones in wireless muti-path environment.
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