The analyses of anti-jamming algorithm in space propagation

In space wireless transmission system, blanket jamming was one of the most common and serious interference to the receiver. Adaptive array antenna technology bases on its external signal environment; adjusts automatically each element weight coefficient enables the main beam of the antenna array pattern at the desired signal direction, and depression at the interference signal direction. It has been proved to be a good solution for wireless transmission anti-jamming. This paper under the space wireless transmission system's special signal environment, presents a view of Linearly Constrained Minimum Variance (LCMV) beamforming algorithm and Power Inversion (PI) beamforming algorithm. Also, the performances of these two algorithms and their respective input/output ratio improvement are evaluated by Matlab simulation. Then it gives the signal condition of these two adaptive algorithms.