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针对宽带码分多址 (WCDMA)系统中小区搜索过程的编码调制方案 ,在讨论同步信道 SCH(包括主同步信道PSCH和辅助同步信道 SSCH)性能基础上 ,研究了同步信道、公共导频信道 (CPICH)功率分配方案对小区搜索整体性能的影响。通过在加性高斯白噪声 (AWGN)信道下仿真了多时隙、多帧非相干累加的检测方法对小区搜索各步骤性能的改善 ,得到了在 16 0 m s小区搜索时间内同步信道和公共导频信道功率分配的最佳方案为 PSSCH:PPSCH=0 .2 5 :0 .75 ,PCPICH:PSCH=0 .35 :0 .6 5
Aiming at the coding modulation scheme of cell search in WCDMA system, based on discussing the performance of SCH (including PSCH and SSCH), the synchronization channel and common pilot channel CPICH) power allocation scheme on the overall performance of cell search. By improving the performance of cell search in multi-slot and multi-frame non-coherent detection based on additive white Gaussian noise (AWGN) channel, the synchronization channel and common pilot The best scheme for channel power allocation is PSSCH: PPSCH = 0 .25: 0 .75, PCPICH: PSCH = 0 .35: 0 .65