Radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain.

对于射频噪声，通过平均距离频频法和频域陷波的方法可以去掉；

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This algorithm firstly calculates the average power serial, and then finishes the detection of PN code rate through the analysis of frequency spectrum and smooth processing.

该算法首先计算序列的平均功率，然后对其进行谱分析并作平滑处理而完成伪码速率的判定。

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Second, a special 2-D the fourth-order time-average moment spectrum is defined to estimate frequency in zero mean multiplicative and additive noise.

定义了特殊的二维四阶时间平均多矩谱来估计信号频率。

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