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. (WO2010111864) METHOD AND SYSTEM FOR ANTENNA CALIBRATION

Pub. No.:    WO/2010/111864    International Application No.:    PCT/CN2009/075226
Publication Date: Fri Oct 08 01:59:59 CEST 2010 International Filing Date: Tue Dec 01 00:59:59 CET 2009
IPC: H04B 17/00
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
LU, Chenhong
路陈红
Inventors: LU, Chenhong
路陈红
Title: METHOD AND SYSTEM FOR ANTENNA CALIBRATION
Abstract:
The present invention discloses a method for antenna calibration, wherein the sub-carrier frequency points of the transmitting antenna are grouped by the transmitter, and the frequency domain calibration pilot signal of said transmitting antenna is determined according to the groups; the transmitter obtains time domain integrated calibration pilot signal according to the frequency domain calibration pilot signal, and forms time domain transmitting signal with the time domain integrated calibration pilot signal and transmits to the receiver; the receiver reforms the time domain integrated calibration pilot signal with the received time domain transmitting signal; the receiver obtains frequency domain response of each group according to the time domain integrated calibration pilot signal, and obtains frequency domain responses of all sub-carrier frequency points of calibration channel according to the frequency domain response of each group; the receiver determines compensation coefficient of the calibration channel according to the frequency domain responses of all sub-carriers. The present invention also discloses a system for antenna calibration. With the present invention, it enables the transmission of the antenna calibration pilot signal to avoid the influence of Downlink Pilot Time Slot (DwPTS) and Uplink Pilot Time Slot (UpPTS), and the calibration precision is improved without affecting the normal communications.