CN112019280A - Intelligent antenna network calibration method - Google Patents
Intelligent antenna network calibration method Download PDFInfo
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- CN112019280A CN112019280A CN202010860148.8A CN202010860148A CN112019280A CN 112019280 A CN112019280 A CN 112019280A CN 202010860148 A CN202010860148 A CN 202010860148A CN 112019280 A CN112019280 A CN 112019280A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
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Abstract
The invention discloses an intelligent antenna network calibration method, which comprises the following steps: inputting the signal into a radio frequency switching combination circuit through a directional coupler; then, comparing the obtained signal with a reference signal after down-conversion, baseband processing and filtering to obtain a channel error; finally, the channel error is fed back to the calibration detection unit for calibration; the calibration detection unit consists of a calibration detection plate and a calibration base band plate, and the calibration detection plate consists of a radio frequency switch and a transceiver selector switch for channel detection; calibrating the base band plate: the method is used for detecting channel errors and generating error calibration weights which are input to an antenna baseband for processing. The method is simple to operate, high in calibration efficiency and low in cost.
Description
Technical Field
The invention belongs to the technical field of network calibration, and particularly relates to an intelligent antenna network calibration method.
Background
The intelligent antenna is a key technology of the TD-SCDMA mobile communication system. By the beam forming technology based on the intelligent antenna, multi-user interference is effectively inhibited, and system capacity is increased. In an actual smart antenna system, various time-varying errors exist, such as phase and gain differences introduced by the change of a radio frequency channel along with environment, device aging, amplitude-frequency phase-frequency characteristic distortion, I/Q imbalance and the like. These time-varying errors will cause variations in beam shape and power control accuracy, thereby reducing system capacity and affecting system performance, so it is necessary to perform online calibration of the smart antenna.
The existing intelligent antenna network calibration method has the problems of relatively complex flow, more equipment application, higher cost and lower calibration efficiency, so that a targeted improved design is needed.
Disclosure of Invention
The invention aims to provide an intelligent antenna network calibration method which is put into use to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method of smart antenna network calibration, comprising:
inputting the signal into a radio frequency switching combination circuit through a directional coupler;
then, comparing the obtained signal with a reference signal after down-conversion, baseband processing and filtering to obtain a channel error;
finally, the channel error is fed back to the calibration detection unit for calibration;
the calibration detection unit consists of a calibration detection plate and a calibration base band plate, and the calibration detection plate consists of a radio frequency switch and a transceiver selector switch for channel detection;
calibrating the base band plate: the method is used for detecting channel errors and generating error calibration weights which are input to an antenna baseband for processing.
Preferably, the feed of the detection signal is introduced through a bi-directional coupler for each array radio frequency channel.
The invention has the technical effects and advantages that: this intelligent antenna network calibration method, the known signal of following passageway transmission is as the reference signal, loop through directional coupler with the signal, radio frequency switches after the combined circuit down conversion, baseband processing and filtering then compare the signal that obtains with the reference signal, thereby obtain the channel error, detect the channel error through calibration baseband board, produce the error and calibrate the weight and input and handle to the antenna baseband, feed back the error to the calibration detecting element again, accomplish the calibration, calibration equipment uses less, the calibration cost is reduced, and accelerated calibration efficiency, the practicality is stronger.
Drawings
Fig. 1 is a block diagram of the working principle of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an intelligent antenna network calibration method as shown in figure 1, which comprises the following steps:
inputting the signal into a radio frequency switching combination circuit through a directional coupler;
then, comparing the obtained signal with a reference signal after down-conversion, baseband processing and filtering to obtain a channel error;
finally, feeding back the channel error to a calibration detection unit;
calibrating the base band plate: the method is used for detecting channel errors and generating error calibration weights which are input to an antenna baseband for processing.
The operating principle, the known signal that the following passageway was launched is as the reference signal, loop through directional coupler with the signal, the radio frequency switches after the combined circuit down conversion, baseband processing and filtering then compares the signal that obtains with the reference signal, and calibration detecting element comprises calibration pick-up plate and calibration base band board, carry out the channel detection through calibration pick-up plate radio frequency switch and transceiver change over switch, thereby obtain the channel error, detect the channel error through calibration base band board, produce the error calibration weight and input and handle to the antenna baseband, again feed back the error to calibration detecting element, accomplish the calibration, calibration equipment uses less, the calibration cost has been reduced, and accelerated calibration efficiency, the practicality is stronger.
The feed of the detection signal is introduced through the bi-directional couplers of the rf channels of each array. The accuracy of the feedback signal is ensured, and the stability and effectiveness of the signal feedback frequency are ensured.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (2)
1. An intelligent antenna network calibration method is characterized in that: the method comprises the following steps:
inputting the signal into a radio frequency switching combination circuit through a directional coupler;
then, comparing the obtained signal with a reference signal after down-conversion, baseband processing and filtering to obtain a channel error;
finally, the channel error is fed back to the calibration detection unit for calibration;
the calibration detection unit consists of a calibration detection plate and a calibration base band plate, and the calibration detection plate consists of a radio frequency switch and a transceiver selector switch for channel detection;
calibrating the base band plate: the method is used for detecting channel errors and generating error calibration weights which are input to an antenna baseband for processing.
2. A method for calibrating an intelligent antenna network according to claim 1, wherein: the feed of the detection signal is introduced through the bi-directional couplers of the rf channels of each array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010860148.8A CN112019280A (en) | 2020-08-25 | 2020-08-25 | Intelligent antenna network calibration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010860148.8A CN112019280A (en) | 2020-08-25 | 2020-08-25 | Intelligent antenna network calibration method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112019280A true CN112019280A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010860148.8A Pending CN112019280A (en) | 2020-08-25 | 2020-08-25 | Intelligent antenna network calibration method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9812816A (en) * | 1997-09-15 | 2000-08-08 | Adaptive Telecom Inc | Processes for wireless communication, and to efficiently determine a space channel of the mobile unit in a wireless communication system at the base station, and cdma base station |
| KR100758309B1 (en) * | 2006-09-29 | 2007-09-12 | 한국전자통신연구원 | RF Path Error Correction Device and Method for Wireless Communication System with Multiple Antennas |
| CN101588198A (en) * | 2008-05-19 | 2009-11-25 | 芯通科技（成都）有限公司 | Multi-carrier intelligent antenna calibration intermediate frequency process method and apparatus |
| CN102426300A (en) * | 2011-08-31 | 2012-04-25 | 西安空间无线电技术研究所 | Satellite-borne beam forming receiving channel amplitude and phase error calibration system and method thereof |
| US20150118970A1 (en) * | 2013-10-30 | 2015-04-30 | Samsung Electronics Co., Ltd. | Rf loopback via antenna coupling for calibration of multiple transceiver systems |
-
2020
- 2020-08-25 CN CN202010860148.8A patent/CN112019280A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9812816A (en) * | 1997-09-15 | 2000-08-08 | Adaptive Telecom Inc | Processes for wireless communication, and to efficiently determine a space channel of the mobile unit in a wireless communication system at the base station, and cdma base station |
| KR100758309B1 (en) * | 2006-09-29 | 2007-09-12 | 한국전자통신연구원 | RF Path Error Correction Device and Method for Wireless Communication System with Multiple Antennas |
| CN101588198A (en) * | 2008-05-19 | 2009-11-25 | 芯通科技（成都）有限公司 | Multi-carrier intelligent antenna calibration intermediate frequency process method and apparatus |
| CN102426300A (en) * | 2011-08-31 | 2012-04-25 | 西安空间无线电技术研究所 | Satellite-borne beam forming receiving channel amplitude and phase error calibration system and method thereof |
| US20150118970A1 (en) * | 2013-10-30 | 2015-04-30 | Samsung Electronics Co., Ltd. | Rf loopback via antenna coupling for calibration of multiple transceiver systems |
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Application publication date: 20201201 |