基于连续波体制的分布式站址水下运动目标检测跟踪技术研究

The project aims at the problems of low refresh rate, low detection probability and poor concealment for active sonar remote detection of underwater targets, and carries out research on distributed site underwater moving target detection and tracking technique based on continuous wave. Continuous wave system detection technique can increase the target echo refresh rate and reduce the target loss rate. Combined with the continuous wave technique, the underwater target Tracking-Before-Betection(TBD) technique can obtain high refresh rate and high processing gain, reduce the signal detection threshold with the same detection performance, and improve the weak target detection performance.Distributed site detection technique can overcome the problems of poor concealment and blind areas caused by continuous wave detection, and further improves the target detection performance.. Based on the analysis of the influence of the continuous wave waveform system and distributed site configuration on the detection perfermance, the project intends to break through key techniques such as distributed site continuous wave weak target detection, continuous wave Tracking-Before-Detection(TBD) with high refresh rate and low detection threshold etc, and complete the theoretical analysis, numerical simulation and lake/sea test verification.

项目针对水下目标主动声纳远程探测刷新率低、检测概率下降、隐蔽性差的问题，开展基于连续波体制的分布式站址水下运动目标检测跟踪技术研究。连续波体制探测技术可增加目标回波刷新率、降低目标丢失率；水下目标检测前跟踪（TBD）技术与连续波体制相结合，可获得高刷新率和高处理增益，可降低同等检测性能的信号检测阈，提高弱目标检测性能；分布式站址探测技术可克服隐蔽性差和连续波探测盲区的问题，并进一步提高目标探测性能。. 项目拟在连续波波形体制和分布式站址配置对探测特性影响分析的基础上，突破分布式连续波弱目标检测、连续波高刷新率低检测阈检测前跟踪（TBD）等关键技术，完成基于连续波体制分布式站址水下目标探测技术的理论分析、数值仿真和湖、海试验证研究。

水声探测领域中，主动探测方式与被动探测方式都是目标探测的主要手段。由于水下目标隐身技术的发展，使得基于目标辐射噪声的被动探测方式的性能下降明显，而基于目标回波的主动探测方式的性能虽有下降，但下降有限，特别是非反向散射方向的隐身能力有限，所以主动探测尤其是多基地探测在水下目标探测领域具有较大前景。针对探测效率低、检测概率低的技术现状和难点，发展基于连续波体制的分布式站址水下运动目标检测跟踪技术。发展基于连续波体制的探测技术可增加目标探测刷新率、降低目标丢失率。.通过采用理论仿真结合试验验证的方式，开展了基于连续波体制的分布式站址水下运动目标检测跟踪技术研究。在连续波波形体制和分布式配置对探测特性影响分析的基础上，对分布式连续波弱目标检测、连续波高刷新率低检测阈检测前跟踪（TBD）等关键技术实现突破，完成了基于连续波体制分布式站址水下目标探测技术的理论分析、数值仿真和湖、海试验证研究。