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Radio frequency calibration method and device capable of realizing channel reciprocity of time division duplex wireless communication system

A wireless communication system, radio frequency calibration technology, applied to the device for realizing the method, to realize the calibration field of time division duplex wireless communication system channel reciprocity, can solve the problem of not being able to be applied, increasing communication cost and computational complexity, and unavoidable Channel information transmission and other issues to avoid calibration inaccuracy and improve performance

Inactive Publication Date: 2014-04-30
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The disadvantage of the above-mentioned first method is that the transmission of channel information between communication nodes cannot be avoided, and there is still a non-negligible signaling overhead; the disadvantage of the above-mentioned second method is that a calibration needs to be triggered every time a signal is transmitted. Each calibration requires two channel estimates, and each signal transmission has experienced a composite communication channel, which increases the communication cost and computational complexity
In addition, the above methods are ideal radio frequency calibration solutions, and the above methods cannot be applied when the communication party has sudden interference

Method used

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  • Radio frequency calibration method and device capable of realizing channel reciprocity of time division duplex wireless communication system
  • Radio frequency calibration method and device capable of realizing channel reciprocity of time division duplex wireless communication system
  • Radio frequency calibration method and device capable of realizing channel reciprocity of time division duplex wireless communication system

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Experimental program
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Effect test

Embodiment 1

[0072] Step 701: trigger radio frequency calibration;

[0073] Step 702: Perform K times of RF sub-calibration to obtain K sets of sub-calibration factors

[0074] Step 703: Remove the calibration factors in the presence of burst interference, that is, the sub-calibration factors that deviate greatly from other sub-calibration factors, and finally obtain the K' set of sub-calibration factors;

[0075] Step 704: Calculate the calibration factor, specifically:

[0076] g ji = 1 K ′ Σ k = 1 K ′ g ji k

[0077] Step 705: a radio frequency calibration ends.

Embodiment 2

[0079] This embodiment assumes that the probability of burst interference is low, that is, it is considered that there is no burst interference in at least one of the two radio frequency sub-calibration processes, and K=3 is set, and the upper limit of k is K, so as to perform the minimum number of radio frequency sub-calibration The calibration process is the principle, and the specific implementation process is as follows: Figure 8 shown.

[0080] Step 801: trigger radio frequency calibration;

[0081] Step 802: Perform the first radio frequency sub-calibration to obtain

[0082] Step 803: Perform the second radio frequency sub-calibration to obtain

[0083] Step 804: Judging whether there is sudden interference in the above two sub-calibration processes, the judging method can be expressed as:

[0084] If it is less than a certain value, it is considered that there is no burst interference, and enters step 805, otherwise, enters step 806;

[0085] Step 805: Obtai...

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Abstract

The invention discloses a radio frequency calibration method and device capable of realizing the channel reciprocity of a time division duplex wireless communication system in an environment with burst interference. In the method, multiple radio frequency sub-calibrations are performed and each sub-calibrations process is realized by utilizing pilot signals transmitted between communication nodes. By adopting the method disclosed by the invention, the inaccuracy of radio frequency calibration caused by the burst interference can be effectively avoided, the transmission of channel information between the communication nodes in the radio frequency calibration process can also be avoided, the channel reciprocity can be applied in the time division duplex wireless communication system, the signaling cost can be reduced and the system performance can be increased.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a calibration method for realizing channel reciprocity in a time division duplex (TDD) wireless communication system, and a device for realizing the method. Background technique [0002] In the new generation wireless communication system, the use of Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) wireless technology can meet the system's requirements for high data rate and high system capacity. The idea of ​​MIMO technology is to use the weak correlation of spatial channels to realize data diversity or multiplexing, or to use the strong correlation of spatial channels and the principle of wave coherence to realize directional transmission of data, thereby improving the reliability and transmission of signal transmission. rate. Both communication parties of the wireless communication system, such as a base station (BS, Base Station) and a user equipmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/14H04B17/00H04B17/21
Inventor 朱新宁杨旭曾志民王海燕夏璐来志京冯春燕果敢魏然
Owner BEIJING UNIV OF POSTS & TELECOMM
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