Pan Xiang, Jiang Jingning, Wang Nan
College of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
Sensors (Basel). 2017 Jan 11;17(1):133. doi: 10.3390/s17010133.
A broadband signal model is proposed for a distributed multiple-input multiple-output (MIMO) sonar system consisting of two transmitters and a receiving linear array. Transmitters are widely separated to illuminate the different aspects of an extended target of interest. The beamforming technique is utilized at the reception ends for enhancement of weak target echoes. A MIMO detector is designed with the estimated target position parameters within the general likelihood rate test (GLRT) framework. For the high signal-to-noise ratio case, the detection performance of the MIMO system is better than that of the phased-array system in the numerical simulations and the tank experiments. The robustness of the distributed phased-MIMO sonar system is further demonstrated in localization of a target in at-lake experiments.
针对由两个发射机和一个接收线性阵列组成的分布式多输入多输出（MIMO）声纳系统，提出了一种宽带信号模型。发射机相距较远，以照射感兴趣的扩展目标的不同方面。在接收端利用波束形成技术增强弱目标回波。在广义似然比检验（GLRT）框架内，利用估计的目标位置参数设计了一个MIMO检测器。在数值模拟和水槽实验中，对于高信噪比情况，MIMO系统的检测性能优于相控阵系统。在湖上实验中对目标进行定位时，进一步证明了分布式相控MIMO声纳系统的鲁棒性。
