A Serial Sampling Closed‐Loop System for Transceiver Beam Nulling

ABSTRACT Considering the limited space, power of the unmanned platform, and the inconsistency of the antenna array transceiver beam pattern, we design a serial sampling closed‐loop system for transceiver beam nulling, which has a strong robustness and global convergence. It is mathematically proved that the serial sampling closed‐loop system is capable of adaptively nulling jamming signals by analyzing the system mathematical model for the first time. Our work addresses the issue that the existing transceiver system on unmanned platforms cannot estimate the directions of arrival (DOAs) of jamming signals causing the transmit beam not to be nulled in the DOAs of jammers. Simulation results show that the proposed system can be applied in scenarios with strictly limitations on space, weight, and power (SWaP) to suppress jamming signals when receiving desired signals while covering the transmissions.