Aperture-Level Simultaneous Transmit and Receive Simplified Structure Based on Hybrid Beamforming of Switching Network

With the increasing competition for spectrum resources, technology of simultaneous transmit and receive (STAR) is attracting more attention. However, full digital aperture-level (FD-ALSTAR) difficult to implement in a large-scale array with high frequency bandwidth due its hardware cost power consumption. Therefore, this paper combines FD-ALSTAR hybrid beamforming proposes two categories four types simplified structures based on reduce number RF links (NRF), cost, operation In view complexity fully connected structure low amplitude phase control accuracy partially structure, an switching network (HBF-SN-ALSTAR) proposed, mathematical model established. The simulation results show that proposed can effectively NRF consumption, increase system redundancy, improve reliability. 144 × antenna array, under condition = 16 HBF-SN-ALSTAR, is, 1/9 links, effective isotropic isolation (EII) only 17 dB less than FD-ALSTAR. experimental prove effectiveness structure.