A method and device for intelligent antenna array calibration of TDD wireless communication system
A wireless communication system and smart antenna technology, applied in antenna arrays, diversity/multi-antenna systems, antennas, etc., can solve the problem that the calibration accuracy is affected by the installation environment and installation experience, and achieve the effect of reducing radiation and increasing calibration accuracy
Inactive Publication Date: 2007-09-05
ZTE CORP
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Problems solved by technology
[0011] The technical problem to be solved by the present invention is to design a coupling calibration device and a coupling calibration method for TDD wireless communication system smart antenna array. This technical solution can well solve the problem that the calibration accuracy in engineering practice is affected by the installation environment and installation experience problem, and the method is easy to operate
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[0034] Below according to accompanying drawing and embodiment the present invention will be described in further detail:
[0035] Referring to FIG. 2 , it shows a base station structure of a TDD mobile communication system with smart antenna calibration function using the method and device of the present invention. This base station structure mainly includes N identical smart antenna elements 11, N identical filter couplers 12, N base station transceivers 13, one or more power splitters / combiners 14, one for transmission RF cables 15 for calibration signals, N identical RF cables 16 for transmitting transceiver signals, a base station signal processing unit 17 and a calibration signal processing unit 18 . in. Said N is a positive integer greater than or equal to 2. Each antenna element 11 is connected to the corresponding base station transceiver 13 through a filter coupler 12 and a radio frequency cable 16; one end of the radio frequency cable 15 for transmitting calibratio...
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The invention is a calibrator of intelligent antenna array in TDD wireless communication system, including: N antenna array cells and N filter couplers and at least a power dividing / combining device, where each filter coupler is connected with a corresponding antenna array cell and a corresponding base-station radio frequency channel; the combing end of the power dividing / combining device is connected with the calibrated end of calibration signal cell of each base station and the dividing end is connected with the coupled end of each filter coupler. As calibrating, the base station outputs a calibrating beacon signal, the power dividing / combining device divides the beacon signal into N signals to input into N filter couplers, respectively, and then the N signals are transmitted to corresponding base station receiving channels, which process them; the base station transmits a calibrating beacon signal through N signal transmissionchannels to N filter couplers, respectively, and the N signals are input through the power dividing / combining to the base station receiving channels, which process the calibrating signals from N transmission channels, respectively. It solves the problem that the calibrating course is influenced by the environment, and improves the calibrating accuracy.
Description
technical field [0001] The present invention relates to a method and device for realizing calibration of a TDD (time division duplex) wireless communication system, in particular to a calibration technology for a smart antenna array of a TD-SCDMA and PHS wireless communication system, which is used for transmitting and receiving channels of a TDD wireless communication base station system Calibration of the amplitude and phase characteristics. Background technique [0002] In recent years, in the field of wireless communication technology, smart antenna technology has become one of the most attractive technologies in the field of mobile communication. The smart antenna adopts the space division multiple access technology, and uses the difference in the transmission direction of the signal to distinguish the signals of the same frequency or the same slot and the same code channel, so as to maximize the use of limited channel resources. Compared with the non-directional anten...
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Inventor 王长明李景毅张鸿华海宁
Owner ZTE CORP