直扩通信在军事保密通信中得到了广泛应用,鉴于其具有的高抗干扰、低截获特性,使得对其信号的检测一直是一个难点,也是研究的热点.在直扩信号检测方法中,正交分路相关检测方法凭借其良好的实用性能,得到了人们的关注.但该方法未能完全消除载波成分,使得其在较高信噪比条件下性能不理想.鉴于此,针对正交分路相关检测的互相关函数处理过程加以改进,提高其在较高信噪比条件下的性能.仿真结果表明,在一定信噪比条件下,改进方法的性能较原方法有明显提高.%Direct Spread communication has been widely used in the military secure communications. In view of its high anti-jamming, low interception characteristics, the detection for DS signal has always been a difficulty and research hotspot. Quadrature correlation detection method due to its good practical performance gets people' s attention in many detection mothods for DS signal. However, this method doesn' t completely eliminate the carrier component so that its performance is not so ideal with higher SNR . In view of this, the cross-correlation function process of the quadrature correlation detection has been ameliorated, to improve its performance with high SNR. The simulation results show that the performance of the improved method has been enhanced obviously with a certain SNR.
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