In 3GPP LTE system,the calculation of conventional initial cell search algorithm is very complex, which results in that mobile equipment needs to consume more power to complete search process and degrades the performance of cell search simultaneously. Differential correlations are utilized to achieve enhanced detection quality of secondary synchronization signal detection by removing effects of channel and the detection algorithm of secondary synchronization signal is improved by quantized cross-correlation. Compared with the conventional secondary synchronization detection algorithm, the modified one has low computional complexity. Simulation comparisons between the conventional algorithm and the modified one demonstrate that the detection correct rate and reliability of the modified algorithm are advanced.%在3GPP LTE系统中,传统的初始小区搜索算法具有较大的运算复杂度,这就导致移动设备需要消耗更多的能量来完成搜索过程,同时也影响了小区搜索的可靠性.通过差分相关移除信道影响从而提高辅同步信号检测质量,以及运用量化后的互相关来简化辅同步检测算法.改进后的辅同步检测算法与传统算法相比,具有较低的运算复杂度.通过仿真分析比较传统算法和改进算法,表明改进算法的检测正确概率有所提升,可靠性得到了提高.
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