Spreading technique of satellite beacon to avoid jamming attacks

A jammer or interceptor has to use a huge antenna to precisely track and point on the CW beacon signal from the target geostationary satellite. In this paper, we propose a novel beacon waveform of a spread spectrum type to decrease an effective antenna gain, which causes a pointing error to the attacker. We have analyzed the antenna gain loss of the popular mono pulse tracking scheme for a huge antenna, which causes a pointing error in case of a very low signal to noise ratio and a small half power beam width. From the analysis, we can confirm that the pointing error becomes higher than 1E-2 when the SNR is lower than 6dB and the half power beam width is lower than 0.1. As the results, the proposed scheme promises the effective capability of the anti-jamming against the attacker using such a large diameter of antenna.