舰船电子对抗

孔径级同时收发(ALSTAR)是实现综合射频一体化系统的关键难点之一，对于ALSTAR系统，为了防止接收阵列饱和，必须在空域有效减小来自发射阵列的近邻自干扰功率。提出基于波束赋形的空域自干扰抑制算法，在不显著影响阵列性能的基础上，提高系统的隔离度。首先对ALSTAR系统的自干扰信号和目标接收信号的传输过程进行建模分析。然后以最大化发射阵等效全向辐射功率(EIRP)并最小化耦合至接收阵的自干扰功率为准则，优化发射阵列合成系数；以最大化接收阵合成功率增益并最小化接收到的自干扰功率为准则，优化接收阵列合成系数。最后重点分析了多径传播对自干扰抑制算法性能的影响。试验仿真表明，在阵列性能损失3 dB的条件下，自干扰抑制比能达到13 dB。然而在多径场景的自干扰抑制性能会明显下降。

Aperture-level simultaneous transmit and receive(ALSTAR) is one of the key difficulties in achieving an integrated RF system.For the ALSTAR system, in order to prevent the receiving array from saturating, it is necessary to effectively mitigate the nearest neighbor self-interference power from the transmitting array.A spatial self-interference depression algorithm based on beamforming is proposed to improve the isolation degree of the system without significantly affecting the array performance.Firstly, the transmission process of the self-interference signal and the target receiving signal of the ALSTAR system is modeled and analyzed.Then, based on the criterion of maximizing the effective isotropic radiated power(EIRP) of the transmitting array and minimizing the self-interference power coupled to the receiving array, the synthesis coefficients of the transmitting array are optimized; and based on the criterion of maximizing the systhesis power gain of the receiving array and minimizing the self-interference power received, the synthesis coefficients of the receiving array are optimized.Finally, the impact of multipath propagation on the performance of the self-interference suppression algorithm is analyzed in detail.The experimental simulation results show that under the condition of an array performance loss of 3 dB,the self-interference suppression ratio can reach 13 dB.However, the self-interference suppression performance in the multipath scenario will significantly decline.