Transmit Beamforming for Frequency-Selective Channels

TitleTransmit Beamforming for Frequency-Selective Channels
Publication TypeConference Paper
Year of Publication2006
AuthorsLiang, Y. -wen, R. Schober, and W. Gerstacker
Conference NameVehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Pagination1 -5
Date Publishedsep.
Keywordsbeamforming filters, decision-feedback equalization, diversity reception, equalisers, finite impulse response, frequency selective surfaces, frequency-selective channels, GSM/EDGE channels, infinite impulse response, multifrequency antennas, optimized delay diversity, receiving antennas, single-antenna transmission, telecommunication channels, transient response, transmit beamforming, transmitting antennas

In this paper, we propose beamforming schemes for frequency-selective channels with decision-feedback equalization (DFE) at the receiver. We consider both finite impulse response (FIR) and infinite impulse response (IIR) beamforming filters (BFFs). In case of IIR beamforming, we are able to derive closed-form expressions for the optimum BFFs. In addition, we provide an efficient numerical method for recursive calculation of the optimum FIR BFFs. Simulation and numerical results for typical GSM/EDGE channels confirm the significant performance gains achievable with beamforming compared to single-antenna transmission and optimized delay diversity.


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