畸变信道中宽带信号检测性能的研究

为寻求水下畸变信道中稳健的宽带信号检测器，本针对理想信道和两种畸变信道，即时间扩展信道和频率扩展信道，研究了副本相关检测器、分段副本相关检测器、副本相关积分检测器，并给出其检测性能的理论分析和对比试验结果。研究结果表明：各种信道条件下，均有相应的最佳检测器；副本相关积分器具有稳键的检测性能。

On Detecting Broadband Signal in Distortive Channels

Large time bandwidth product signal, called broadband signal, is usually used for detecting under reverberation interference due to the better performance of the broadband detector. But in distortive channels, the performance becomes degraded. So it is important to obtain robust detectors in distortive channels for broadband signals. In this paper, we studied the detection performance of three detectors ( i.e. replica correlation detector, segmented replica correlator, and replica correlation integrator) in an ideal channel, a time spreading distortion (TSD) channel, and a fast fading distortion (FFD) channel. Our main conclusions are as follows: (1) In an ideal channel, the optimal detector is replica correlation detector; (2) In TSD channel, the optimal detector is replica correlation integrator; (3) In FFD channel, the optimal detector is segmented replica correlator; (4) The replica correlation integrator is robust in all the three channels.