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中文摘要：
针对低信噪比下WCDMA信号检测与伪码（OVSF码）周期检测的难题，利用四阶累积量能够有效抑制高斯白噪声和二次谱具有明显谱峰的特性，提出了一种基于四阶累积量和二次谱相结合的WCDMA信号盲检测方法。该方法首先利用四阶累积量的切片检测出WCDMA信号，并估计得到WCDMA信号的采样率，接着通过二次谱算法所得到的谱峰间的距离来估计出OVSF码的周期参数。计算机仿真结果表明，该算法可以有效地对WCDMA信号进行检测并估计OVSF码周期。
英文摘要：
According to WCDMA signal detection and pseudo code （ OVSF code） cycle testing problem in the lower SNR, with using fourth-order cumulant can effectively inhibit the Gauss white noise and reprocessing power spectrum has obvious characteris- tics of spectral peak, it is proposed one method which is based on the fourth-order cumulant and reprocessing power spectrum to detect WCDMA signal. The method firstly uses fourth-order cumulant slice to detect WCDMA signal, and estimate the WCDMA signal sampling rate. Then through the reprocessing power spectral algorithm with the spike pulse distance to estimate the OVSF code cycle parameters. Computer simulation results show that the algorithm can be effectively to detect the WCI）MA signal and esti- mate the OVSF code period.
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