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1. (WO2010118617) METHOD FOR SENDING DOWNLINK MIDAMBLES IN A WIRELESS COMMUNICATION SYSTEM

Pub. No.:    WO/2010/118617    International Application No.:    PCT/CN2009/075881
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Thu Dec 24 00:59:59 CET 2009
IPC: H04W 28/00
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
LIANG, Ting
梁婷
ZHU, Dengkui
朱登魁
LIU, Ying
刘颖
LI, Zirong
李子荣
Inventors: LIANG, Ting
梁婷
ZHU, Dengkui
朱登魁
LIU, Ying
刘颖
LI, Zirong
李子荣
Title: METHOD FOR SENDING DOWNLINK MIDAMBLES IN A WIRELESS COMMUNICATION SYSTEM
Abstract:
A method for transmitting downlink midambles on a wireless communication system is provided. A base station transmits midambles at one or two symbols of the 3rd or the 4th or the 7th symbol in downlink sub-frames. When the number of transmitting antennas of the base station is 2 or 4, the base station sends midambles at the 3rd or the 4th or the 7th symbol in downlink sub-frames. When the number of transmitting antennas of the base station is 8, the base station sends midambles at the 3rd and 4th symbols or the 3rd and 7th symbols or the 4th and 7th symbols in downlink sub-frames. Transmitting midambles using the method of the present invention can, when a terminal uses dedicated pilots, accurately measure the real channel situation of a downlink, and enable Precode Matrix Indication (PMI), Rank Indication (RI) and Channel Quality Information(CQI) feedback. At the same time, the method of the present invention provides both lower complexity and improved pilot tracking capability.