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本文研究在通用计算机上模拟一个长线阵被动声纳站现场试验的有关问题。模拟研究的实施方法是:计算机首先产生一组能够反映目标信号特性以及目标在水平面内逐点转动的数字信号;然后按照“频率域上合成波束”原理所规定的信号处理顺序,计算机进行各步运算,得到声纳站的各个搜索波束在-90°到+90°目标方位范围内的输出响应,由此可以估计声纳站的实际检测性能及检验声纳站的预定设计方案。本文分析和比较了“FFT-DFT”和“FFT-FFT”两种多波束设计方案的模拟处理结果,从而表明“频率域上合成波束”的信号处理方案能够成功地用于构成长线阵的多波束检测系统;并且也对有关理论分析所预示的结果作了验证。
This paper studies the problem of simulating the field test of a long-line passive sonar station on a general-purpose computer. The implementation of simulation research is that the computer first generates a set of digital signals that reflect the characteristics of the target signal and the point-by-point rotation of the target in the horizontal plane. Then, according to the signal processing sequence specified in the principle of “composite beam in the frequency domain”, the computer performs each step Computing the output response of each search beam of the sonar station within the range of -90 ° to + 90 ° target azimuth, so as to estimate the actual detection performance of the sonar station and verify the predetermined design of the sonar station. This paper analyzes and compares the simulation results of two multi-beam design schemes “FFT-DFT” and “FFT-FFT”, which shows that the signal processing scheme of “synthetic beam in frequency domain” can be successfully used to construct multi-beam Beam detection system; and also verify the results predicted by the theoretical analysis.