宽带波束形成技术的研究

在很多情况下,要求基阵能够不失真地接收宽带信号,因此要求波束形成器的波束图具有与频率无关的特性。深入研究了利用自适应方法设计具有特定频率响应的FIR滤波器用于进行时域宽带波束形成的应用,给出了仿真结果,验证了算法的有效性。采用FPGA或DSP实现带通滤波器是一项成熟的技术,所以通过设计特定频率响应的FIR滤波器来实现宽带波束形成技术在工程上是可实现的。

Study on Broadband Beamforming Technique

In many cases, it is essential that the array could receive broadband signals without distortion. So the beamformer must have a frequency invariant beam pattern. A method to design a finite impulse response （FIR） filter with specific frequency response by use of adaptive method, and the use of this kind of filter in time-domain broadband beamformer are deeply studied in this paper. The simulation results show that the algorithm is effective, and besides, the realization of band-pass filter based on FPGA or DSP is a mature technology. So the broadband beamforming technology can be realized in engineering by designing a specific frequency response FIR filter.