分裂波束双通道方位走向的空间模糊问题

目标回波的空间方位走向是重要的目标空间特性，其特性和特征是水下体目标识别的重要依据。讨论了基于分裂波束双通道方位走向方法目标尺度识别中的方位走向的扩展特性，给出了目标走向的理论统计趋势结果。进一步给出了分裂波束双通道方位走向的空间视角扩展的模糊范围。同时讨论了不同发射信号形式和参数对目标尺度张角模糊范围的影响。结果表明：短CW脉冲和LFM发射信号形式下，目标尺度方位扩展角模糊程度要小于长CW脉冲发射信号形式下的目标方位扩展角模糊程度，识别舷角范围增大。

On spatial ambiguity of bearing trend based on splitting dual beamforming channels

The feature of bearing trend, which is the most important spatial characteristic of target-echo, is of importance to underwater target recognition. In this paper the problem about bearing trend based on splitting dual channels is discussed at first, and the theoretical result of bearing trend is deduced. Furthermore, the ambiguity of visual angle expanding based on splitting dual channels is presented, and the effects of different transmission signal types and parameters on the ambiguity of visual angle expanding are discussed. It is shown that ambiguity of target length expanding angle for short CW and LFM pulses is smaller than that for long CW pulse, and the range of recognition angle is enlarged.