Based upon the study of the cyclic spectrum of DS &DS/CDMA signals, a spectral correlation approach is presented to estimate the chip interval of PN sequence.

• （3）在对DS及同步DS/CDMA信号周期谱（谱相关）研究的基础上，论证了应用DS信号的周期谱（谱相关）可以得到该信号PN码片宽度的估计，提出了一种用于估计同步DS/CDMA信号PN码片宽度的谱相关算法，并作到了较低的信噪比容限。