Title :
Eigenbeamforming with selection diversity for MIMO-OFDM downlink
Author :
Choi, In-Keong ; Kim, Seong Rag ; In-Keong-Choi
Author_Institution :
New South Wales Univ., NSW, Australia
Abstract :
Eigenbeamforming is shown to be effective over a spatially correlated fading channel. In conjunction with the short-term selection of eigenmodes, it can also provide good transmit diversity gain with a smaller amount of feedback. In this paper, we investigate the use of eigenbeamforming with short-term selection for orthogonal frequency-division multiplexing (OFDM) systems. We derive exact and asymptotic expressions of the average bit error rate (BER) for a spatially correlated Rayleigh fading channel. Especially. the asymptotic expression allows us to gain insight into eigenbeamforming.
Keywords :
MIMO systems; OFDM modulation; Rayleigh channels; adaptive signal processing; beam steering; diversity reception; eigenvalues and eigenfunctions; error statistics; mobile radio; BER; MIMO-OFDM downlink; adaptive downlink beamforming; antenna diversity; average bit error rate; channel feedback; eigenbeamforming; eigenmode selection diversity; eigenmode short-term selection; mobile stations; spatially correlated Rayleigh fading channel; spatially correlated fading channels; transmit diversity gain; Array signal processing; Base stations; Bit error rate; Diversity methods; Downlink; Fading; Feedback; Frequency division multiplexing; OFDM; Receiving antennas;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400347