Optimal Design of Wideband Array Beamforming Technology in Frequency Domain
In order to improve the beamforming performance of broadband phased array systems,this paper focuses on the delay compensation problem in broadband phased array systems.A frequency domain broadband array beamforming method is used to ana-lyze the principle of using overlapping FFT for delay compensation in broadband phased array systems and the reasons for errors.Based on a 64-element broadband phased array system with a received signal bandwidth of 600MHz,it studied the effects of overlap-ping FFT parameters such as subarray size,FFT points,overlap rate,bit width,and sampling rate on the delay accuracy,signal fi-delity,and beam performance..The frequency domain broadband array beam synthesis technology is optimized while meeting the re-quirements of engineering applications.The research results show,that the sub array do not exceed 9 antenna elements,the FFT points less than 512,the overlap rate less than 1/16,and the bit width less than 12 bits,which meets the requirements of the inde-xes.It provides a basis and reference for the overlapping FFT application in practical engineering,and reduces the complexity of its engineering implementation.
microwave technologyoverlapping FFTwideband beamformingsignal synthesiscompensation of time delaydis-persion phenomenon
万方数据
维普
