Adaptive Beampattern Synthesis for Frequency Diverse Array Using Space-Frequency Decomposition

In this paper, we propose a novel beampattern synthesis method for frequency diverse array (FDA) utilizing the space-frequency decomposition of signals received from the target. After receiving the target response, autoregressive vector extrapolation technique is used to extend the original signal matrix. Then space-frequency decomposition is performed to the extrapolated matrix for obtaining the left singular vectors which imply the information of target location. At last, the resulting vectors are employed as the weighting factor for transmit signal design. Different from conventional FDA radar which requires additional parameter estimation method, adaptive beampattern steering can be achieved based on the received signals directly using the proposed method. Numerical simulation results demonstrate the effectiveness of the proposed method.