Blind Precoding in Line-of-Sight MIMO Channels

Paul Ferrand1, Sheng Yang

  • 1Huawei Technologies Co. Ltd., France

Details

11:30 - 12:45 | Wed 6 Jul | Pentland A | R9.3

Session: MIMO 1: Beamforming, Precoding and Transceiver Designs of MIMO systems

Abstract

As we move towards densified networks for mobile access, with a larger number of access points, the need for high performance wireless backhaul increases drastically. In this respect, line-of-sight (LoS) multiple-input, multiple-output (MIMO) communication is a promising technique which can enable spatial diversity gains in such links, without increasing the allocated bandwith or overstepping requirements in radiated power. In this paper, we show that under practical conditions, the LoS MIMO channel matrix with dual-polarized (DP) antennas is block-circulant with circulant blocks (BCCB). This fact allows one to blindly diagonalize the channel, even in the absence of channel side-information (CSI) at the transmitter. In this case we show that appropriate precoding steps can greatly improve the performance of non-linear decoding in the LoS MIMO channel.