Satellite figured antenna anti-intrusion based on high-resolution algorithm

Abstract

The method manages to solve the problem of high resolution and high arithmetical complexity existed in normal approach in order to reach main beam-forming and be capable of making real time process for multi high strength interferences. It comprises: a beam selector is used to make channel selection control in order to select several channels under interference; sending the signals from the selected channels into a process branch circuit; the selected signals firstly are converted down to 1.0 GHZ and are sent to band filter; the signals outputted from the filter are sent to the phase detector, and negative frequency spectrum is removed from the those signals, and the real signals are converted into the complex signals. The algorithm used in current system is implemented by using the correction of amplitude and phase, high resolution angle measurement and self-adaptive zeroing process.

Description

technical field [0001] The invention relates to the technical field of electronic anti-jamming, in particular to an anti-jamming method for a spaceborne shaped antenna based on a high-resolution algorithm. This method can be used in satellite communication to perform beamforming in space to suppress multiple strong interferences. Background technique: [0002] An important feature of modern military technology is that various weapons and equipment are more and more widely used and dependent on radio electronic technology. To defeat the enemy in modern warfare led by information technology, it is necessary to gain the advantage of battlefield perception, that is, through various platforms, such as space-based, air-based, ground-based, vehicle-mounted and ship-borne, etc., and use electricity, light, sound, temperature, etc. Sensors such as sensors and humidity can obtain battlefield information correctly and in a timely manner. Radar has the advantage of working all day and...

AI Technical Summary

Problems solved by technology

In theory, the problem of strong interference suppression can be solved, but in actual hardware design, multi-channel (each antenna unit corresponds to a channel) analog-to-digital conversion (A / D) to the digital domain for signal processing, for the commonly used L-band (1.0 G-2.0G), C-band (4.8-8.0G), X-band (8G-12.5G) spaceborne radar, in order to achieve A / D conversion, the center frequency needs to be down-converted at least twice or even three times to hundreds of Megabytes can be used for effective sampling, and the receiver bandwidth of satellite radar is relatively wide, sometimes reaching 1G, which needs to be divided into several sub-generations for processing separately, which brings a relatively large amount of analog hardware equipment, and due to the complexity of the channel and The instability of analog devices makes it difficult to guarantee the consistency of the receiving channels of each array element. This problem is a major problem in the estimation of interference direction by digital signal processing methods.

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