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多亮点目标回波混叠条件下速度检测
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摘要
水下目标由于其本身尺度及运动状态等因素,产生的目标回波往往可以等效为一系列散射亮点的叠加,各声散射成分在时域和频域上均存在混叠。针对这个问题,本文首先建立了较为完备的带有尺度信息的运动目标多亮点回波模型。并以长脉冲信号、线性调频信号为发送信号,通过对模糊函数峰脊线的研究,分析影响这两种常规信号速度检测性能的本质原因。本文对主动声纳发射信号形式的设计具有一定的指导意义。
Due to the factors such as scale and velocity of underwater target, target echo can usually be equivalent to the superposition of echoes from multi-scatters, and echoes overlap phenomenon exist both in time domain and frequency domain. A echo highlight signal model with information of scale and range rate are built in this paper. By the study of ambiguity function ridge, we analyze the essential reasons for the influence of velocity detection performance when use CW and LFM signal as transmitted waveform. There is a certain guiding significance on the design of active sonar transmitted waveform.
引文
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