Intelligent antenna network calibration method

Abstract

The invention discloses an intelligent antenna network calibration method. The method comprises the following steps: inputting a signal into a radio frequency switching combination circuit through a directional coupler; after down-conversion, baseband processing and filtering, comparing an obtained signal with a reference signal to obtain a channel error; and finally, feeding the channel error back to the calibration detection unit for calibration. The calibration detection unit is composed of a calibration detection plate and a calibration baseband plate, and the calibration detection plate is composed of a radio frequency switch used for channel detection and a transceiver change-over switch. And the calibration baseband board is used for detecting a channel error, generating an error calibration weight and inputting the error calibration weight into the antenna baseband for processing. The method is simple to operate, high in calibration efficiency and low in cost.

Description

technical field [0001] The invention belongs to the technical field of network calibration, and in particular relates to a smart antenna network calibration method. Background technique [0002] Smart antenna is the key technology of TD-SCDMA mobile communication system. Through the beamforming technology based on the smart antenna, the multi-user interference is effectively suppressed and the system capacity is increased. In the actual smart antenna system, there are various time-varying errors, such as phase and gain differences introduced by radio frequency channel changes with the environment, device aging, amplitude-frequency phase-frequency characteristic distortion, and I / Q imbalance. These time-varying errors will lead to changes in beam shape and power control accuracy, thereby reducing system capacity and affecting system performance, so it is necessary to perform online calibration of smart antennas. [0003] The existing smart antenna network calibration method...

AI Technical Summary

Problems solved by technology

In the actual smart antenna system, there are various time-varying errors, such as phase and gain differences introduced by radio frequency channel changes with the environment, device aging, amplitude-frequency phase-frequency characteristic distortion, I / Q imbalance, etc.

These time-varying errors will lead to changes in beam shape and power control accuracy, thereby reducing system capacity and affecting system performance, so it is necessary to perform online calibration of smart antennas

[0003] The existing smart antenna network calibration method has a relatively cumbersome process and many equipment applications, resulting in high cost and low calibration efficiency, so targeted improvement design is needed

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