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在理想信道中拷贝相关器是最佳的检测器,但其在多途相干信道中检测效果并不理想.本文提出一种新的时间域相干处理器,称之自适应相关器.对自适应相关器进行了理论分析,证明其对缓慢时变的多途相干信道有较拷贝相关器更好的适配能力,对干扰有更好的抑制能力.计算机仿真实验,水库单程信道实验均证明自适应相关器的信杂比增益均显著高于拷贝相关器,特别还进行了双程海洋信道实验,表明即使存在18节多卜勒的情况下,自适应相关器的处理增益仍显著高于拷贝相关器.
Copying the correlator in the ideal channel is the best detector, but its performance in multi-channel coherent channel detection is not satisfactory.This paper proposes a new time domain coherent processor, called adaptive correlator, The correlator has been theoretically analyzed to prove that it has better adaptability for more slowly correlated multi-path coherent channel and better suppression of interference.Computer simulation experiments and single channel test of reservoirs have proved that The signal to noise ratio of adaptive correlator is significantly higher than that of the copy correlator. In particular, a two-way oceanic channel experiment has been performed, which shows that the processing gain of the adaptive correlator is still significantly higher than that of the replica even in the presence of 18 Doppler Correlator.