Performance Degradation in Cross-Eye Jamming Due to Amplitude/Phase Instability between Jammer Antennas

Cross-eye gain in cross-eye jamming systems is highly dependent on amplitude ratio and the phase difference between jammer antennas. It is well known that cross-eye jamming is most effective for the amplitude ratio of unity and phase difference of 180 degrees. It is assumed that the instabilities in the amplitude ratio and phase difference can be modeled as zero-mean Gaussian random variables. In this paper, we not only quantitatively analyze the effect of amplitude ratio instability and phase difference instability on performance degradation in terms of reduction in cross-eye gain but also proceed with analytical performance analysis based on the first order and second-order Taylor expansion.

TAKING INTO ACCOUNT THE PHASE INSTABILITY OF GENERATORS CAUSED BY THE INFLUENCE OF IONIZING RADIATION OF SPACE ON THE PARAMETERS OF CARRIER FREQUENCY SYNCHRONIZATION SYSTEMS

The article investigates the possibilities of closed and combined synchronization systems for operation in the conditions of phase instability of generators caused by the influence of ionizing radiation of outer space. The inconsistency of the closed-type synchronization system with respect to minimizing the variance of phase errors and increasing the dynamics during carrier frequency tracking is shown. For the combined synchronization system, the article clarifies the process of open communication synthesis and proposes analytical dependences that allow the technique of open communication synthesis to be specified taking into account the phase instability of generators caused by the ionizing radiation of space.