FIR Beamforming for Frequency-Selective Channels with Linear Equalization

TitleFIR Beamforming for Frequency-Selective Channels with Linear Equalization
Publication TypeJournal Article
Year of Publication2007
AuthorsLiang, Y. -wen, R. Schober, and W. Gerstacker
JournalCommunications Letters, IEEE
Pagination622 -624
Date Publishedjul.
Keywordsfinite impulse response filters, FIR filters, frequency selective surfaces, frequency-selective channels, GSM/EDGE channels, linear equalization, multibeam antennas, optimum FIR beamforming filters, radio access networks, single-antenna transmission

In this letter, we consider transmit beamforming with finite impulse response (FIR) filters for frequency-selective channels and simple linear equalization at the receiver. Since a closed-form solution for the optimum FIR beamforming filters (BFFs) does not seem to exist, an efficient numerical method for their recursive calculation is developed. Our numerical results show that for typical GSM/EDGE channels short FIR BFFs can closely approach the performance of the optimum infinite impulse response (IIR) BFFs derived in [1] and yield significant gains over single-antenna transmission.


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