Antenna calibration system and method

Abstract

The invention provides antenna emission calibration system and method, antenna receiving calibration system and method, and an antenna calibration system, wherein the antenna calibration system comprises a predistortion module, one or more operation emission channels, a calibration receiving channel, a calibration emission channel and one ore more operation receiving channels, wherein the predistortion module is used for carrying out digital predistortion processing on an emission calibration sequence; the one or more operation emission channel are respectively used for processing the predistorted emission calibration sequence and transmitting the processed and predistorted emission calibration sequence to a coupling network, wherein the operation emitting channel comprises a power amplification part; the calibration receiving channel is used for receiving an emission calibration sequence from the coupling network; and the one or more operation receiving channels are respectively used for receiving a receiving calibration sequence from the coupling network. The invention ensures that DPD (Digital Pre-Distortion) and AC (Antenna Calibration) cooperatively work and eliminates the nonlinearity caused by power amplification, thereby not influencing the amplitude and the phase position of the calibration sequence, ensuring that the antenna calibration is more accurate and greatly saving hardware resources by adopting a sharing mode of an operation antenna and a calibration antenna.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to an antenna calibration system and method. Background technique [0002] In the system that makes up the smart antenna, the characteristics of the various components used, especially the active devices, are very sensitive to the operating frequency and ambient temperature, and the characteristics of each link are not changed due to the above reasons. The same, so the calibration of the smart antenna array should be carried out periodically while the wireless base station is running. [0003] The calibration of the transceiver antenna is completed through the following three steps during the operation of the base station and during operation: [0004] Step 1: Select a basic calibration sequence with good anti-white noise characteristics, and the calibration sequence is formed by periodic cyclic shifting of the basic calibration sequence. [0005] Step 2, transmit calibra...

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Problems solved by technology

image 3 It shows the spectrum diagram before and after pre-distortion. From the spectrum after DPD, it can be seen that the spectrum of the signal after DPD is greatly distorted

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