Calibration method and device of antenna gain
A technology for calibrating antennas and antennas, applied in the field of communications, can solve the problems that the reciprocity of the system channel cannot be improved, the accuracy of the self-calibration method cannot meet the calibration requirements, etc., so as to improve the capacity and spectrum utilization, improve the reciprocity, improve Effects of Calibration Accuracy
Active Publication Date: 2014-12-03
HONOR DEVICE CO LTD
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In this way, the transmit-receive gain ratio of the calibrated antenna is not equal to the transmit-receive gain ratio of the reference antenna, so that the accuracy of the self-calibration method often cannot meet the calibration requirements, and thus cannot improve the reciprocity of the system channel
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0021] First combine the figure 1 Describe the equivalent channel model. figure 1 A schematic diagram of an equivalent channel of a TDD MIMO system is shown. It should be understood that the embodiment of the present invention only uses the TDD MIMO system as an example to describe the equivalent channel model, but the embodiment of the present invention should not be limited thereto.
[0022] like figure 1 As shown, in a typical TDD MIMO system equivale...
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The invention discloses a calibration method and a device of antenna gain. The method includes obtaining reference equivalent channel information of a first channel from a reference antenna to a to-be-calibrated antenna; obtaining first equivalent channel information of a second channel from the reference antenna to the to-be-calibrated antenna under a first sending power; obtaining second equivalent channel information and third equivalent channel information of the second channel under a second sending power and a third sending power respectively; determining a calibration factor of the to-be-calibrated antenna under specific sending powder; and calibrating sending signals of the to-be-calibrated antenna according to the calibration factor. The device comprises a first obtaining module, a second obtaining module, a third obtaining module, a determining module and a calibrating module. The method and the device have the advantages that effects of sending power change on the calibration can be eliminated, calibration accuracy of the antenna gain can be improved, and channel reciprocity, capacity and spectral efficiency of the system can be improved.
Description
technical field [0001] The invention relates to the communication field, in particular to a method and a device for calibrating antenna gain in the communication field. Background technique [0002] With the continuous increase of mobile packet service traffic, people's demand for mobile communication air interface bandwidth is also increasing. Multiple Input Multiple Output (Multiple Input Multiple Output, referred to as "MIMO") system can double the capacity and spectrum utilization of the communication system without increasing the bandwidth by configuring multiple antennas at the transmitting end and the receiving end. Therefore, it is widely adopted by existing wireless communication systems (such as Long Term Evolution (LTE) for short). In the MIMO system, if the transmitting end does not have channel state information (Channel State Information, referred to as "CSI"), the system can only obtain multi-antenna diversity gain, but cannot obtain array gain. In order to ...
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IPC IPC(8): H04B7/06H04B17/00H04B17/12H04B17/13
Inventor 张晨费泽松孙卫军
Owner HONOR DEVICE CO LTD