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2006
IEEE

Transmit Beamforming with Finite-Rate Feedback for Frequency-Selective Channels

8 years 10 months ago
Transmit Beamforming with Finite-Rate Feedback for Frequency-Selective Channels
— In this paper, we consider beamforming with finite– rate feedback for frequency–selective channels with decisionfeedback equalization (DFE) at the receiver. Using average bit error rate as performance measure, we propose a global vector quantization (GVQ) algorithm for codebook design. This algorithm is deterministic and independent of initial conditions. The proposed design method does not impose any constraints on the number of transmit and receive antennas, the antenna correlation, or the fading statistics. Simulation results for typical GSM/EDGE channels show that finite–rate feedback beamforming with one or two feedback bits achieves significant performance gains over single–antenna transmission, transmit antenna selection, and optimized delay diversity. While beamforming filters of length one are preferable if only few feedback bits can be afforded, longer filters can improve performance if a sufficiently large number of feedback bits is available.
Yang-wen Liang, Robert Schober, Wolfgang H. Gersta
Added 11 Jun 2010
Updated 11 Jun 2010
Type Conference
Year 2006
Where GLOBECOM
Authors Yang-wen Liang, Robert Schober, Wolfgang H. Gerstacker
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