Automatic calibration method and apparatus for receiver's amplitude-frequency response

Abstract

The invention discloses an automatic calibration method and apparatus for receiver's amplitude-frequency response. The method comprises the following steps: dividing a testing signal into two equal channels with one transmitted to a dynamometer and the other to the receiver for synchronous measurement to obtain power error data; then hierarchically processing the power error data: first, generating a reference curve based on the power error data; selecting calibration points from the reference curve, and then obtaining the power error data of the calibration points in different states and conducting linear interpolation to produce calibration data and calibration table of more practical value; and finally storing the calibration table in the receiver so that the receiver could automatically call the calibration table data to compensate the received signal to ensure the measurement accuracy of the receiver. In the entire calibration process, the calibration points are reasonably selected; high automation can be achieved; a fast data process can be achieved, consuming less time while achieving a good calibration effect. The invention also provides an automatic calibration apparatus for receiver's amplitude-frequency response and a data selection method.

Description

technical field [0001] The present application relates to the field of electronic instruments, in particular to a method and device for automatically calibrating the amplitude-frequency response of a receiver. Background technique [0002] For a narrowband receiver, there will be a certain amplitude-frequency response in a wide receiving frequency range, that is, the amplitude of the received signal will change with the frequency of the input signal. In order to ensure the measurement accuracy of the receiver, it is necessary to calibrate the amplitude-frequency response of the receiver. The traditional calibration method is to calibrate the amplitude-frequency response of the receiver under different hardware states with a certain frequency step or with fixed calibration points. However, in the traditional method, due to the unstable signal source or the influence of other environmental factors, the step size is not easy to determine, and the calibration point is difficult...

AI Technical Summary

Problems solved by technology

However, the traditional method is often affected by unstable signal sources or other environmental factors, making it difficult to determine the step size and difficult to select calibration points, resulting in calibration errors

For a receiver with a large test frequency range, a large step may cause frequency points with large intermediate errors to be missed, and too small a step will make the calibration process take too long. In addition, due to the discrete hardware characteristics of each receiver The selected calibration points cannot reflect the amplitude-frequency response characteristics of each receiver very well

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