虚拟接收目标定位技术中引导声源对目标声源的信噪比补偿

Compensation to SNR of the object source by improving SNR of the guide source in source localization using virtual receiver technique

目标声源的低信噪比是目标定位技术中的瓶颈。在浅海近似均匀环境中,利用虚拟接收方法对声源测距的目标定位方法相比于传统的匹配场定位方法可以避免对环境参数和声场模型的依赖,同时省去生成拷贝场时的大量计算。通过数值模拟和实验数据处理,比较了在虚拟接收方法声源测距中不同信噪比的引导声源对目标声源测距的结果。提高引导声源的信噪比,可以一定程度上提高于涉条纹清晰度,从而提高测距准确度。提高引导声源的信噪比可作为目标声源的信噪比补偿是利用虚拟接收方法的目标定位技术的又一个优点。

Low Signal to Noise Ratio （SNR） of the target source is the bottleneck of the sound source localization technology. In approximate range-independent shallow water environment, compared to Matched Field Processing （MFP） localization method, source localization using virtual receive method can reduce dependence on environment parameters and the acoustic field model, and at the same times avoid complex calculation. Localization results using virtual receiver method and guide sources with different SNR are analyzed. Improving SNR of the guide source can improve the clarity of the interference fringes to some extent, and thus improve the ranging accuracy. Improving SNR of the guide source can compensate SNR of the object source is another advantage of virtual receiver method of source localization.