Multi-Channel Amplitude/Phase Calibration Method

Abstract

A multi-channel amplitude / phase calibration method proposed by the present invention aims to provide a method capable of providing multi-channel amplitude / phase calibration results. The present invention is realized through the following technical scheme: in the phase calibration, the real and imaginary part advance circuit respectively takes the real part and the imaginary part of the reference zero intermediate frequency signal and the zero intermediate frequency signal to be calibrated, and completes the first stage through the integral clearing circuit Filtering, the results of the first-stage filtering are conjugated and the two signals are sent to the integral clearing circuit for the second-stage filtering, and the relative reference of the signal to be calibrated can be obtained by the arctangent operation of the ratio of the two signals the phase of the signal. In the amplitude calibration, the real and imaginary part advance circuit respectively takes the real part and imaginary part of the reference zero-IF signal and the zero-IF signal to be calibrated, and the integral clearing circuit performs square operation on the result after two-stage filtering, and the two-way signal They are summed separately and then sent to the integral clearing circuit for second-stage filtering. The ratio of the two signals is the amplitude of the signal to be calibrated relative to the reference signal.

Description

technical field [0001] The invention relates to a multi-channel amplitude / phase calibration method of a phase array control system. Background technique [0002] Phase is one of the important parameters of radio measurement and has been widely used in the field of radio measurement and modern electronic equipment. The premise of multi-target array antenna transmitting or receiving combined beams is the consistency among multiple transmitting or receiving channels, because all beamforming algorithms are based on multi-channel is ideal and consistent. Therefore, the multi-beam antenna system must complete precise calibration to achieve the consistency of amplitude and phase between channels, which is an important prerequisite for the realization of array antenna engineering. In addition, in the process of use, it is necessary to continuously carry out multi-channel testing in order to make timely and accurate diagnosis of the multi-channel characteristics of the system. The ...

AI Technical Summary

Problems solved by technology

[0005] In traditional processing, the amplitude calibration has high requirements on the signal-to-noise ratio of the calibration signal, and the phase calibration based on the phase-locked loop takes a long time to process. When the number of channels is large, the calibration time of the entire system is affected. With the phase array control system With rapid development, users need a fast and reliable multi-channel amplitude and phase calibration method

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