Smart antenna calibration method and smart antenna calibration system

A technology of smart antenna and calibration method, applied in diversity/multi-antenna system, baseband system components, space transmit diversity and other directions, can solve the problems of low calibration accuracy of smart antenna and reduce the accuracy of weight factor of carrier antenna, etc. The effect of improving antenna calibration performance

Active Publication Date: 2013-06-19
TD TECH COMM TECH LTD
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Problems solved by technology

[0004] Since the calibration receiving channel of the transmitting calibration receives the signals transmitted by multiple transmitting channels at the same time, the signals transmitted by each transmitting channel affect each other, so the accuracy of the calculated weight factor of each carrier antenna is reduced, resulting in the smart antenna Less accurate calibration

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  • Smart antenna calibration method and smart antenna calibration system
  • Smart antenna calibration method and smart antenna calibration system
  • Smart antenna calibration method and smart antenna calibration system

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Embodiment Construction

[0020] figure 1 It is a schematic flow chart of the smart antenna calibration method of the present invention. Such as figure 1 As shown, the smart antenna calibration method includes the following steps:

[0021] Step S101, multiplying the original training sequence by the Walsh code pre-allocated for the transmission channel of the smart antenna to obtain the calibration training sequence corresponding to the transmission channel, wherein the Walsh code (WALSH) of each transmission channel different;

[0022] Step S102, sending the calibration training sequence through the transmission channel of the smart antenna, so that the calibration training sequence reaches the calibration channel through the calibration network;

[0023] Step S103, receiving the calibration training sequence through the calibration channel, multiplying the received calibration training sequence by the Walsh code of the transmission channel to obtain a reception training sequence corresponding to t...

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Abstract

The invention provides a smart antenna calibration method and a smart antenna calibration system. The smart antenna calibration method includes that an original training sequence is multiplied by walsh codes which are distributed for launch channels of smart antennas in advance to obtain calibration training sequences corresponding to the launch channels, wherein the walsh codes of all the launch channels are different; the calibration training sequences are sent through the launch channels of the smart antennas so that the calibration training sequences are enabled to reach a calibration channel through a calibration network; the calibration training sequences are received through the calibration channel, and the received calibration training sequences are multiplied with the walsh codes of the launch channels to obtain receiving training sequences corresponding to the launch channels; launch compensation coefficients corresponding to the launch channels are obtained according to the original training sequences and the receiving training sequences; and the launch channels are calibrated according to the launch compensation coefficients. According to the smart antenna calibration method and the smart antenna calibration system, high-precision calibration can be carried out on the launch channels of the smart antennas.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a smart antenna calibration method and system. Background technique [0002] Smart antenna is the key technology of TD-SCDMA mobile communication system. Through the beamforming technology based on the smart antenna, the multi-user interference is effectively suppressed and the system capacity is increased. In the actual smart antenna system, there are various time-varying errors, such as phase and gain differences introduced by radio frequency channel changes with the environment, device aging, amplitude-frequency phase-frequency characteristic distortion, and I / Q imbalance. These time-varying errors will lead to changes in beam shape and power control accuracy, thereby reducing system capacity and affecting system performance, so it is necessary to perform online calibration of smart antennas. [0003] In the prior art, a typical smart antenna calibration technology is a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04J13/18H04B7/06H04B7/08
Inventor 操陈斌魏明邓时颖赵泉彭德坤
Owner TD TECH COMM TECH LTD
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