Abstract

An effective phase-only transmitting beamforming method is proposed for aperture-level self-interference cancelation (SIC) in full-duplex phased arrays. The transmitting gain pattern and self-interference coupling power are calculated by the active element patterns and scattering parameter between the transmitting subarray and receiving subarray. Focusing on achieving good trade-off between transmit-receive isolation and transmitting gain loss, a non-convex multi-objective optimization problem corresponding to phase-only transmitting beamforming is established. By the introduction of iterative idea, the non-convex optimization problem is converted into solving a sequence of convex problem, and the phase excitations in transmitting subarray can be efficiently achieved. The simulated results as for X-band 8×8 transmitting subarray and receiving subarray show that the proposed method achieve around 29.3 dB averaged isolation improvement with only 0.2dB transmitting gain loss.

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