Adaptive beamforming in time modulated antenna arrays based on beamspace data

An approach for adaptive beamforming (ABF) in time modulated antenna arrays (TMAAs) based on beamspace data is proposed in this paper. By using time modulation technology with appropriate time sequences, multiple beams can be obtained in the TMAAs and each of them is located at different directions. Based on the beamspace data received by the multiple beams, the optimum weighting for each beam can be determined by adaptive algorithm such as sample matrix inversion (SMI). Simulation results of an 8-element time modulated linear array (TMLA) demonstrate the validity of the proposed approach for the ABF. As compared to conventional uniform linear array (ULA), better performance of the proposed approach is reported.