Method for sonar array signal simulation by utilizing interpolation filter
An interpolation filter and signal simulation technology, which is applied in the field of signal simulation, can solve problems such as impossibility of real-time realization, large amount of calculation, poor precision, etc., and achieve the effects of easy real-time realization, increased calculation speed, and improved calculation speed
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[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] On the DSP (ADSP 21060) platform, the real-time simulation system of one-array primitive signal is realized. Among them, the system parameters are: the number of line array elements N=64, the interval of line array elements d=1.5m, the signal incident angle θ=30°, the system sampling frequency Fs=25KHz, the sampling period Ts=1 / Fs=4× 10 -5 S, the maximum time delay K=1650 that the system can handle. The incident signal is sin(2*π*f*t), the angle θ between the incident signal and the base array is 30°, that is, the own ship’s angle for obtaining the target signal, and the speed of the signal in water is c=1500m / s. As shown in Figure 1.
[0030] The present embodiment carries out following steps:
[0031] (1) Design interpolation filter:
[0032] ■The sampling frequency of the system is 25kHz, that is, the sampling period T ...
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