Low-complexity codebook-based beamforming with four transmit antennas and quantized feedback channel
2014 (English)Conference paper (Refereed)
In this paper we propose a low-complexity codebook-based beamforming with four transmit antennas and quantized feedback channel. The codebook design aggregates the effect of power allocation and phase rotation through a simple quantized transmit scheme. The codebook-based beamforming uses the feedback information in order to maximize the instantaneous signal-to-noise ratio (SNR) at the receiver. As a result, the proposed scheme presents an array gain. An SNR analysis is performed and it is used to find the optimal feedback information in the sense of maximizing the instantaneous SNR. A bit error rate (BER) analysis for a quantized feedback channel is also derived and it is used to compare to the results obtained for the proposed scheme under different levels of quantization. Simulations are performed over quasi-static flat Rayleigh fading channels for different closed-loop codebook-based schemes with four transmit antennas and unitary transmission rate. Results illustrate that the proposed scheme achieves full diversity order and outperforms other good schemes in terms of array gain.
Place, publisher, year, edition, pages
Istanbul: IEEE , 2014.
Quantized feedback, Coodebook, MIMO
Computer Science Telecommunications Signal Processing
IdentifiersURN: urn:nbn:se:bth-6514DOI: 10.1109/WCNC.2014.6952322Local ID: oai:bth.se:forskinfoD8B51A7EA4975CB2C1257DA10036D858OAI: oai:DiVA.org:bth-6514DiVA: diva2:834032
Wireless Communications and Networking Conference (WCNC)