Improved Adaptive Multi-beam Anti-jamming Algorithm Based on Differential Constraints
Adaptive multi-beam navigation anti-jamming technology,as the anti-jamming technol-ogy with the highest anti-jamming performance at present,can not only inhibit the direction of interfer-ence,but can also generate gain in the direction of the satellite signal,the effective protection for the navigation signal is provided.However,the adaptive multi-beam anti-jamming algorithm needs to ob-tain the incidence angle information of the satellite signal relative to the antenna array in real time,and in the actual engineering application,the attitude measurement errors of the inertial guidance and the motion of the carrier platform are considered,there is a certain deviation in obtained incidence infor-mation,and the filtering will cause signal loss.To address this problem,an improved adaptive multi-beam anti-jamming algorithm based on differential constraints is proposed.The method takes the LCMV criterion as the objective function,and a certain angle range is added as constrains in the inci-dence direction and interference direction of satellite signals.The signal loss caused by the deviation of the incidence angle is weakened.The simulation results show that the method can effectively protect the satellite signals and suppress the interference signals within a certain angular deviation range,thus the anti-jamming performance is improved.
differential constraintsmulti-beam anti-jammingdirection of signal incidenceLCMV algorithm
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