一种混沌水声定位方法

在海洋的探索和开发中通常利用声呐对目标进行探测。由于海面、海底的影响,声信号在海中传播呈现多途特性,这种多径效应和复杂的海洋强噪声会给目标定位带来误差。提出一种基于混杂系统产生混沌信号的水声定位方法。该方法发射宽频混沌信号,可探测性低,与相应的混沌匹配滤波相结合,可以有效减小多径干扰和噪声影响。仿真结果表明,与传统方法和现有混沌定位方法相比,该方法可以有效抵抗多径效应,提高定位精度,同时具有良好的环境兼容性。

An underwater chaotic acoustic positioning method

In the ocean resource exploration and development, the sonar is used to detect the underwater target. Underwater acoustic environment demonstrates the multipath characteristic, because of the surface and bottom reflection, as well as complex noise. These factors bring errors for the target positioning. A new method using the chaotic signal generated by a hybrid system is proposed for underwater target positioning. Broad band chaotic signal is send out, which is difficult to be detected. Combining with the corresponding chaotic matched filter, the effects of noise and multipath propagation can be effectively reduced. Simulation results show that, compared with traditional methods and some existing chaotic positioning methods, the proposed chaotic sonar positioning method can effectively improve the positioning accuracy, which indicates the good environmental compatibility.