Title :
Downlink channel covariance matrix (DCCM) estimation for FDD SDMA
Author :
Liang, Ying-Chang ; Chin, Francois ; Kot, Alex
Author_Institution :
Centre for Wireless Commun., Singapore, Singapore
Abstract :
The downlink channel covariance matrix (DCCM) is of vital importance in determining downlink beamforming weights for base station (BS) antenna array systems. For frequency-division-duplex (FDD) mode, DCCM is difficult to obtain due to lack of direct measurement of downlink channel responses. A novel technique is proposed for estimating DCCM using uplink channel responses only, which does not need DOA estimation and its association. The new technique is much simpler than the DOA-based approach and the GF algorithm
Keywords :
antenna arrays; covariance matrices; mobile radio; space division multiple access; telecommunication switching; DCCM estimation; FDD; SDMA; antenna array systems; base station; beamforming weights; downlink channel covariance matrix; frequency division duplexing; mobile radio; uplink channel responses; Antenna arrays; Array signal processing; Base stations; Calibration; Covariance matrix; Direction of arrival estimation; Downlink; Frequency; Multiaccess communication; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944027
