Opportunistic beamforming based on multiple weighting vectors

5 December 2005

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Wireless Communications

Vol. 4 (6) , 2683-2687
https://doi.org/10.1109/twc.2005.857999

Abstract

In order to improve the throughput of the opportunistic beamforming, the authors generalize the opportunistic beamforming by using multiple random weighting vectors at each time slot. The base station chooses the best weighting vector and performs the opportunistic beamforming with this optimum vector. For the case of equally strong independent fast Rayleigh fading channels, the throughput of the proposed scheme is analytically approximated and the optimum number of random weighting vectors per time slot is obtained. Numerical results demonstrate that the proposed scheme considerably improves the throughput compared to the conventional opportunistic beamforming for a low/realistic number of users.

Keywords

This publication has 7 references indexed in Scilit:

Optimal resource allocation for pilot symbol aided multiuser receivers in Rayleigh faded CDMA channels
IEEE Transactions on Communications, 2002
Data throughput of CDMA-HDR a high efficiency-high data rate personal communication wireless system
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
Opportunistic beamforming using dumb antennas
IEEE Transactions on Information Theory, 2002
Effect of channel estimation error on M-QAM BER performance in Rayleigh fading
IEEE Transactions on Communications, 1999
On the LambertW function
Advances in Computational Mathematics, 1996
On the capacity of a cellular CDMA system
IEEE Transactions on Vehicular Technology, 1991
An analysis of pilot symbol assisted modulation for Rayleigh fading channels (mobile radio)
IEEE Transactions on Vehicular Technology, 1991