低频主动声纳双曲线调频串信号-接收处理联合设计研究

The receive signal of active sonar includes serious reverberation and clutter (false target) interference. After receive processing, what companying with the target’s high-lights are numerous interferential high-lights on the output. How to discriminating target from interference is a difficult problem to be solved in dire need. Analyzing and making use of the scatters’ information of both velocity and scale is an effective way to distinguish target from disturbance. As for active sonar, high distance-velocity resolution capability is needed. The performances of distance-velocity resolution, reverberation and clutter rejection are tightly connected with transmitting waveform design and receive processing. The scheme of combined designing of pulses train of hyperbolic-frequency-modulated signal (PTFM) and receiver is proposed in the item. The contents to be investigated include: studying the wideband ambiguity function of PTFM, uncovering the numerical relations of wideband velocity resolution with the parameters of PTFM, analyzing the characteristic of velocity and scale of interferences and targets, combined designing of PTFM-receiver and velocity and scale information acquiring, synthesizing all the above, analyzing and evaluating system performance through different aspects, optimizing the designing of PTFM parameters and receiver form. The item’s characteristic is in evidence, foundation is firm, and the proposed scheme is definite and reliable. The item deserves further exploration and experimental verification.

主动声纳接收信号中包括严重的混响和杂波（假目标）干扰。接收处理后输出目标亮点的同时，伴随输出大量的干扰亮点。干扰与目标辨识是一个主动声纳亟需解决的难题。分析并利用散射体的速度和尺度联合信息，是区分目标/干扰的有效途径，要求声纳系统具备距离-速度联合高分辨力。距离-速度联合分辨力、混响及杂波干扰抑制性能分析与发射波形设计及接收处理方法密切相关。课题提出了双曲线调频脉冲串信号-接收处理联合设计的解决方案。拟研究的内容包括：分析双曲线调频脉冲串信号的宽带模糊函数；揭示宽带速度分辨力与双曲线调频脉冲串信号参数的定量关系；干扰与目标的速度、尺度特征分析；双曲线调频脉冲串信号参数-接收处理联合设计与速度、尺度信息获取；综合上述研究结果，从多角度分析、评估系统性能，优化设计双曲线调频脉冲串信号参数与接收处理方法。课题特色鲜明，基础扎实，研究方案具体可行，值得进一步深入研究和试验验证。

主动声纳接收信号中包括严重的混响和杂波（假目标）干扰。接收处理后输出目标亮点的同时，伴随输出大量的干扰亮点。干扰与目标辨识是一个主动声纳亟需解决的难题。分析并利用散射体的速度和尺度联合信息，是区分目标/干扰的有效途径，要求声纳系统具备距离-速度联合高分辨力。距离-速度联合分辨力、混响及杂波干扰抑制性能分析与发射波形设计及接收处理方法密切相关。课题提出了双曲线调频脉冲串信号-接收处理联合设计的解决方案。研究的内容包括：分析双曲线调频脉冲串信号的宽带模糊函数；揭示宽带速度分辨力与双曲线调频脉冲串信号参数的定量关系；干扰与目标的速度、尺度特征分析；双曲线调频脉冲串信号参数-接收处理联合设计与速度、尺度信息获取；综合上述研究结果，从多角度分析、评估系统性能，优化设计双曲线调频脉冲串信号参数与接收处理方法。课题特色鲜明，研究方案具体可行，研究成果有意义。