Title :
Linear precoding for space-time coded systems with known fading correlations
Author :
Sampath, H. ; Paulra, A.
Author_Institution :
Iospan Wireless Inc., San Jose, CA, USA
Abstract :
We design an optimal linear precoder for a space-time coded system assuming knowledge of only the transmit antenna fading correlations. Assuming a flat fading channel and a maximum likelihood receiver, we show that the linear precoder transmits power on the eigenmodes of the transmit antenna correlation matrix. The power allocation on the eigenmodes is a form of waterpouring policy. Simulation results are presented to show performance improvement on a space-time coded system.
Keywords :
MIMO systems; correlation methods; eigenvalues and eigenfunctions; fading channels; linear codes; matrix algebra; maximum likelihood detection; radio links; statistical analysis; transmitting antennas; MIMO channels; channel statistics; correlation matrix; eigenmodes; fading correlations; flat fading channel; linear precoding; maximum likelihood receiver; multi-input multi-output channels; power allocation; space-time coded systems; transmit antenna; Channel capacity; Downlink; Fading; Information systems; MIMO; Performance gain; Receiving antennas; Scattering; Transmitters; Transmitting antennas;
Conference_Titel :
Signals, Systems and Computers, 2001. Conference Record of the Thirty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7147-X
DOI :
10.1109/ACSSC.2001.986914
