Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Standard

Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization. / Sharma, Vimal; Lambotharan, Sangarapillai; Jakobsson, Andreas.

VTC Spring 2008 - IEEE Vehicular Technology Conference. 2008. p. 1132-1136.

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Harvard

Sharma, V, Lambotharan, S & Jakobsson, A 2008, Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization. in VTC Spring 2008 - IEEE Vehicular Technology Conference. pp. 1132-1136, IEEE Vehicular Technology Conference (VTC Spring 2008), Singapore, 2008/05/11.

APA

Sharma, V., Lambotharan, S., & Jakobsson, A. (2008). Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization. In VTC Spring 2008 - IEEE Vehicular Technology Conference (pp. 1132-1136)

CBE

Sharma V, Lambotharan S, Jakobsson A. 2008. Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization. In VTC Spring 2008 - IEEE Vehicular Technology Conference. pp. 1132-1136.

MLA

Sharma, Vimal, Sangarapillai Lambotharan, and Andreas Jakobsson "Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization". VTC Spring 2008 - IEEE Vehicular Technology Conference. 2008, 1132-1136.

Vancouver

Sharma V, Lambotharan S, Jakobsson A. Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization. In VTC Spring 2008 - IEEE Vehicular Technology Conference. 2008. p. 1132-1136

Author

Sharma, Vimal ; Lambotharan, Sangarapillai ; Jakobsson, Andreas. / Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization. VTC Spring 2008 - IEEE Vehicular Technology Conference. 2008. pp. 1132-1136

RIS

TY - GEN

T1 - Robust Transmit Multiuser Beamforming Using Worst Case Performance Optimization

AU - Sharma, Vimal

AU - Lambotharan, Sangarapillai

AU - Jakobsson, Andreas

PY - 2008

Y1 - 2008

N2 - We address the problem of transmit beamforming under channel uncertainties for a multiuser MIMO system, where both the transmitter and the receiver are equipped with multiple antennas. In transmit beamforming multi-user multiplexing is performed using spatial diversity techniques so that a base station could serve multiple users in the same frequency band enabling a substantial saving in bandwidth utilization. However, such techniques require nearly perfect knowledge of the channel state information at the transmitter, which is generally not available in practise. In this paper, we propose robust spatial multiplexing schemes based on a worst case performance optimization by incorporating imperfect channel state information. In the simulation, we have examined two scenarios. In the first the channel state information is assumed to have Gaussian distribution errors. In the second scenario, we analyze the performance for errors introduced due to a partial channel state information feedback scheme. In both scenarios, the proposed robust scheme outperforms the conventional scheme.

AB - We address the problem of transmit beamforming under channel uncertainties for a multiuser MIMO system, where both the transmitter and the receiver are equipped with multiple antennas. In transmit beamforming multi-user multiplexing is performed using spatial diversity techniques so that a base station could serve multiple users in the same frequency band enabling a substantial saving in bandwidth utilization. However, such techniques require nearly perfect knowledge of the channel state information at the transmitter, which is generally not available in practise. In this paper, we propose robust spatial multiplexing schemes based on a worst case performance optimization by incorporating imperfect channel state information. In the simulation, we have examined two scenarios. In the first the channel state information is assumed to have Gaussian distribution errors. In the second scenario, we analyze the performance for errors introduced due to a partial channel state information feedback scheme. In both scenarios, the proposed robust scheme outperforms the conventional scheme.

KW - partial CSI feedback scheme

KW - transmit multiuser beamforming problem

KW - channel uncertainties

KW - multiuser MIMO system

KW - worst case performance optimization

KW - multiple antennas

KW - spatial multiplexing schemes

KW - spatial diversity techniques

KW - bandwidth utilization

KW - channel state information

KW - Gaussian distribution errors

M3 - Paper in conference proceeding

SP - 1132

EP - 1136

BT - VTC Spring 2008 - IEEE Vehicular Technology Conference

ER -