TY - GEN
T1 - Reduced entropy parameterization of MIMO channel matrices for finite-rate feedback
AU - Guthy, Christian
AU - Krebs, Alexander
AU - Utschick, Wolfgang
PY - 2009
Y1 - 2009
N2 - By using perfect Channel State Information (CSI) at the transmitter significant gains in terms of sum rate can be obtained in the Multiple-Input Multiple-Output (MIMO) broadcast channel. In practice the links from the users to the transmitters allow only a limited amount of feedback for the CSI, which requires efficient compression schemes at the receivers. In this paper we consider the representation of Gaussian channel matrices by scalar parameters, which are quantized and fed back to the transmitter. This way also the numerically complex vector quantization can be avoided. A novel parameterization is presented which reduces the differential entropy of the parameters and improves the performance of the data transmission in the downlink compared to a state-of-the-art approach.
AB - By using perfect Channel State Information (CSI) at the transmitter significant gains in terms of sum rate can be obtained in the Multiple-Input Multiple-Output (MIMO) broadcast channel. In practice the links from the users to the transmitters allow only a limited amount of feedback for the CSI, which requires efficient compression schemes at the receivers. In this paper we consider the representation of Gaussian channel matrices by scalar parameters, which are quantized and fed back to the transmitter. This way also the numerically complex vector quantization can be avoided. A novel parameterization is presented which reduces the differential entropy of the parameters and improves the performance of the data transmission in the downlink compared to a state-of-the-art approach.
UR - https://www.scopus.com/pages/publications/70449585240
U2 - 10.1109/SPAWC.2009.5161810
DO - 10.1109/SPAWC.2009.5161810
M3 - Conference contribution
AN - SCOPUS:70449585240
SN - 9781424436965
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
SP - 374
EP - 378
BT - 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009
T2 - 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009
Y2 - 21 June 2009 through 24 June 2009
ER -