Comprehensive real-time calibration method for multi-channel digital anti-interference antenna system

Abstract

The invention provides a comprehensive real-time calibration method for a multi-channel digital anti-interference antenna system, which can effectively increase output signal to noise ratio of the system. The method is implemented by the following technical scheme and comprises the following steps: connecting an antenna array surface, channels and a signal processing plate between a power supply and a computer to form a self-calibration antenna system; transmitting a near-field signal and a far-field signal by using a transmitting antenna and a standard antenna at different time, calculating difference between amplitude and phase of two groups of signals output by a receiving channel and storing the difference value into FLASH; controlling the channels and the signal processing plate by using a computer through a serial port so as to be in a calibration state and performing system calibration by comparing the amplitude and the phase of the signal of each channel by a calibration algorithm stored in a field programmable gate array (FPGA); and providing analog inertial navigation information to the signal processing plate by using the computer through the serial port, automatically adjusting the main beam of the antenna according to the inertial navigation information by an anti-interference algorithm in the FPGA, and inhibiting the antenna to receive each external interference signal. According to the method, high efficiency and sustainability of system operation are guaranteed.

Description

technical field [0001] The invention relates to a method for calibrating a multi-channel digital anti-jamming antenna system, in particular to a method for calibrating and a signal processing method for reducing the performance of the antenna system caused by the error of an array antenna unit. Background technique [0002] In the prior art, the multi-channel digital anti-jamming antenna system usually consists of core components such as antenna array, filter, amplifier, frequency converter, analog-to-digital conversion and signal processing. These non-ideal components and modules will cause a variety of errors. The superposition of these errors will have a great impact on the antenna system, which will cause the main beam of the antenna to shift, reduce the system's ability to resist electronic interference, and affect the output signal noise of the antenna system. Ratio, and even cause a serious loss of system output signal-to-noise ratio. For a multi-channel digital anti...

AI Technical Summary

Problems solved by technology

The advantage of this calibration method is that the calibration process can be performed in real time; the disadvantage is that this calibration method only performs channel calibration. After the antenna array is formed, due to mutual influence, there are also inconsistencies between the units, so the inconsistency of the antenna units can also affect system performance

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