Title :
Adaptive Antenna Scaling for Multi-User MIMO Downlink Zero-Forcing Transmissions with Finite Rate Feedback
Author :
Park, Ki-Hong ; Ko, Young-Chai ; Yang, Hong-Chuan ; Kim, James S.
Author_Institution :
Korea Univ., Seoul
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper, we introduce a new zero-forcing beamforming (ZFBF) transmission scheme for multi-user MIMO Gaussian channel with finite rate feedback. With this transmission scheme, the base station adaptively utilizes transmit antennas according to the channel status and the number of active users to control the multiuser interference. We show through selected numerical results that our proposed scheme can achieve remarkable sum-rate improvement compared to other schemes with fixed transmit antennas.
Keywords :
MIMO communication; adaptive antenna arrays; adaptive antenna scaling; channel status; finite rate feedback; multiple input multiple output; multiuser MIMO Gaussian channel; multiuser MIMO downlink; multiuser interference; zero-forcing beamforming transmission; Adaptive arrays; Antenna feeds; Array signal processing; Base stations; Downlink; Feedback; Gaussian channels; Interference; MIMO; Transmitting antennas;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.122
