The Design And Realization Of Anti-Jamming Array Antenna For GNSS

In recent years, satellite navigation technology are widely used in military, scientific research, agriculture and other fields .The importance of satellite navigation applications and the development of related technology caused widespread concern of Governments. There are a number of countries have built or been building an independent global satellite navigation systems, including the U.S. GPS, Russia's GLONASS, the European Union's (EU) Galileo and the Chinese Compass system. As GPS is vulnerable in jamming, how to improve anti-jamming performance of Compass terminal is becoming the content focus.By comparison and analysis of multiple anti-jamming algorithm, the algorithm based on space-time adaptive processing has obvious advantages compared with the simple time domain, frequency and spatial anti-jamming algorithms. This treatment can inhibit a variety of interference, without increase the number of antenna elements. With this advantage, the receivers using this algorithm are suitable for Compass system.While space-time processing improves the anti-jamming capabilities, it also causes a significant increase in computation. Based on the simplified algorithm using dimension reduction, we used the cascade design. In the first stage, we used frequency-domain algorithm for eliminating strong narrowband interference; then in the second stage, we used space-time processing algorithms to eliminate the interference of signals with different spatial angles. As it significantly reduced the amount of calculation, the combined treatment is very useful for project realization and promotion.This paper then described the principle, the equipment composition and the hardware design of anti-jamming antenna array. Finally, in the way of wireless environment experiment, we got the verification of the correctness of the antenna and the effectiveness of anti-jamming.