Antenna calibration method and system, calibration signal processor

Abstract

The invention discloses an antenna calibration method and system, and a calibration signal processor. The method includes: generating an original calibration sequence according to the calibration waveform configuration; performing frequency domain mapping on the original calibration sequence according to the calibration waveform configuration, and generating time domain calibration sequence symbols; sending time domain calibration sequence symbols so as to calibrate the radio frequency channel; when receiving When the calibration sequence arrives, use the received calibration sequence and the original calibration sequence to obtain the radio frequency channel calibration factor; send the radio frequency channel calibration factor to the baseband signal processor, so that the baseband signal processor uses the radio frequency channel calibration factor to perform baseband compensation. The invention utilizes the characteristics of wide transmission bandwidth, large number of frequency domain carriers and simple frequency domain channel estimation in the OFDM system and the FBMC system, and adopts a frequency division method to send calibration sequences on different radio frequency channels.

Description

technical field [0001] The present invention relates to the communication field, in particular to an antenna calibration method and system, and a calibration signal processor. Background technique [0002] The massive antenna technology (Massive MIMO) forms spatial narrow beamforming through a large number of antennas, and makes full use of the spatial dimension to obtain multi-user multiplexing gain, which can effectively improve the spectral efficiency and capacity of the cell. Large-scale antenna technology is one of the key technologies for future communication system research, and relevant research work has already begun in the 3GPP standard organization. Antenna calibration is a key technology in the application of large-scale antenna technology. Since there are differences in each RF transceiver channel in the antenna array, and this difference changes with time, temperature, channel level and other factors, it is necessary to detect the RF channel through antenna cal...

AI Technical Summary

Problems solved by technology

[0004] However, this method of transmitting an orthogonal calibration sequence for calibration channel estimation results in greater interference of the calibration sequence between the transmission calibration channels. At the same time, the channel estimation algorithm needs to distinguish each radio frequency channel channel, which has high complexity.

At the same time, the future 5G system will be a wireless communication system in which multiple air interface waveforms coexist. There is no relevant plan on how to generate a calibration sequence and how to calibrate under this multi-air interface waveform.

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