Method and device for carrying out real-time calibration on radio frequency responses of multi-channel receiver

Abstract

This invention provides a method and a device for carrying out real-time calibration on radio-frequency responses of a multi-channel receiver, and relates to the technical field of wireless communication. The method provided by the invention comprises the following steps of: sending an initial test signal generated by a calibrating transmitting channel to each receiving radio-frequency channel during a calibrating timeslot; acquiring a radio-frequency response signal of each receiving radio-frequency channel, and carrying out a deconvolution operation by using the signal and radio-frequency response signal of each receiving radio-frequency channel so as to obtain a response of each receiving radio-frequency channel; and carrying out compensation calibration on the receiving radio-frequency response of each receiving radio-frequency channel by using the response of each receiving radio-frequency channel. In the process, the acquisition of responses of each receiving radio-frequency channel can be realized in the multi-channel receiver, therefore, in actual applications, each receiving radio-frequency response of the multi-channel receiver can be accurately and conveniently calibrated in real time in various application scenes.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a method and device for real-time calibration of radio frequency response of a multi-channel receiver. Background technique [0002] With the development of modern communication technology, the test requirements for its equipment are getting higher and higher, not only the reliability of the test but also the efficiency of the test are required. [0003] In the development of future communication, multiple-input multiple-output antenna technology (Multiple-Input Multiple-Output, MIMO) and other technologies will inevitably be used in future wireless communication systems, which can improve the information transmission rate. In order to make good use of the advantages brought by MIMO More channel information will inevitably introduce multiple radio frequency channels. [0004] The calibration of the receiving radio frequency channel is very important in t...

AI Technical Summary

Problems solved by technology

The response of the receiving radio frequency channel will change with time, and the parameters such as the gain and phase of the amplifier and other devices will change with the change of factors such as temperature. As a result, in a multi-channel transceiver, the response of each radio frequency channel is different. The difference between them will lead to the deterioration of system performance

For example, if the data of each channel to be transmitted is orthogonal to each other, due to the difference between the radio frequency channels, the data of each channel will no longer be orthogonal after passing through the multi-channel receiver, which will affect the data post-processing and channel estimation.

[0005] In the prior art, a calibration method is to connect the calibration transmitter and the multi-channel receiver through a physical data line before use, and then analyze the signal obtained by the multi-channel receiver, and the receiving radio frequency channel of the multi-channel receiver The radio frequency response is tested and calibrated to ensure the orthogonality of the transmitted signals of each receiving radio frequency channel, and then the calibrated multi-channel receiver is used for subsequent tests, such as the test of the wireless channel, but in practical applications, the multi-channel receiver and multi-channel receivers transmit signals through wireless channels. The above method cannot accurately calibrate the RF response of multi-channel receivers in various application scenarios in real time and conveniently.

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