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文中依据CDMA2000物理层标准,提出了一种针对移动台下行同步的伪噪声(PN)码相位捕获算法。本算法利用部分匹配滤波(PMF)后进行快速傅里叶变换(FFT)实现对PN码相位的可靠捕获,可以应用于有较大的频率偏移和较低的接收信号导频信噪比(Pilot Ec/N 0)的环境下。并进一步对算法进行了性能仿真验证,仿真结果证明了本文算法相对传统差分算法有更好的捕获性能。
According to CDMA2000 physical layer standard, this paper proposes a pseudo-noise (PN) code phase acquisition algorithm for mobile station downlink synchronization. The algorithm uses part-matched filtering (PMF) to perform fast Fourier transform (FFT) to achieve reliable acquisition of PN code phase, which can be applied to have a larger frequency offset and lower received signal pilot signal to noise ratio Pilot Ec / N 0) environment. The performance of the algorithm is further verified by simulation. The simulation results show that the proposed algorithm has better performance than the traditional differential algorithm.