Sciweavers

Share
GLOBECOM
2006
IEEE

Adaptive Precoding for Switching between Spatial Multiplexing and Diversity in MIMO OFDM with Transmit Antenna and Path Correlat

9 years 6 days ago
Adaptive Precoding for Switching between Spatial Multiplexing and Diversity in MIMO OFDM with Transmit Antenna and Path Correlat
Abstract— The path and antenna correlations significantly degrade the system capacity in spatially-multiplexed multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems and increase bit error rate (BER) in orthogonal space-time block coded (OSTBC) OFDM. We develop adaptive dual-mode precoding to improve system performance with transmit antenna and path correlations. Both linear and non-linear Tomlinson-Harashima (TH) precoders are considered. In our proposed approach, precoding for maximizing capacity in spatially-multiplexed OFDM or precoding for minimizing error rate in OSTBC OFDM, is adaptively chosen at the receiver, and only one-bit decision information per subcarrier needs to be sent back to the transmitter. The precoding mode selection depends on the channel conditions. To determine the precoding matrix only the statistical knowledge of the channel is needed at the transmitter, which significantly reduces the feedback requirements. In sp...
Yu Fu, Chintha Tellambura, Witold A. Krzymien
Added 11 Jun 2010
Updated 11 Jun 2010
Type Conference
Year 2006
Where GLOBECOM
Authors Yu Fu, Chintha Tellambura, Witold A. Krzymien
Comments (0)
books