Broadband Spatial Self-Interference Cancellation for Full Duplexing Array
The multi-functional integrated platform with simultaneous transmit and receive capability faces the strong Self-Interference(SI)coupled between the adjacent transmit and receive arrays.In this paper,a wideband SI cancellation method in the space domain for fully digital phased array systems is designed.A non-convex optimization problem is formulated to minimize the residual SI and noise power while constraining the loss of beamforming gain in the desired direction,and an alternate optimization method is proposed to jointly determine the transmit and receive beamforming weights,and the SI cancellation performance of the proposed algorithm is analyzed.Theoretical analysis and simulation results show that a 60-element array can achieve an Effective Isotropic Isolation(EII)of 168 dB when the central frequency is 2.4 GHz,the bandwidth is 100 MHz,and the beamforming gain loss is limited to 3 dB,which is 7 dB below the EII upper bound.
Co-frequency co-time transmit and receiveDigital beamformingSpatial self-interference cancellation
万方数据
维普
