| 摘要 |
<p>A method and apparatus for selecting an antenna mapping in multiple-in /multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measure long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention. SELECT ANTENNA MAPPING 210 FROM CANDIDATE SET 230 NO0 SELECTED ANTENNA 230 MAPPING CALIBRATED CALIBRATE SELECTED ANTENNA YES MAPPING (REQUEST CALIBRATION, ESTIMATE CHANNEL, CALCULATE CALBRATION MATRI) 240 RECElVING. WVTRU YES )CHANGED ANTENNA 2 o 4? FlG.2 B EGIN DATA PACKET TRANSMISSION 310 316A 326A 32 0 312Ad 322A RF C~lN EAM EAM RF CHAIN 3125 SLEETOR . SELECTOR f322B RF CHAIN RF CHAIN , 31 4 --'- '324 CALIBRATION 316N 326M CALIBRATION</p> |
