Performance analysis of distributed transmit beamforming with quantized channel feedback
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(Published version)
Date
2019
Authors
Sung, C.K.
Ahmad, I.
Lechner, G.
Suzuiki, H.
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Conference paper
Citation
IEEE Vehicular Technology Conference, 2019, vol.2019-April, iss.8746444, pp.1-5
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89th IEEE Vehicular Technology Conference, VTC Spring 2019 (28 Apr 2019 - 1 May 2019 : Kuala Lumpar, Malaysia)
Abstract
Distributed transmit beamforming (DTBF) is an efficient technique to increase the transmission coverage in a situation where distributed nodes have limited hardware capabilities such as transmit power or the number of equipped antennas. This scenario is quite typical in tactical communication systems. The DTBF precodes transmit signals based on feedback information. In practice, continuous channel phase information is quantized based on codebook to reduce feedback overhead. In this paper, we will analyze the effect of channel quantization in the DTBF and show a small number of bits are enough to encode channel feedback information to achieve comparable performance compared to the DTBF without channel quantization. We will also derive approximated probability density function of the received SNR, which is very useful to further derive the performance of the DTBF in terms of channel capacity, outage probability, and error rates
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Copyright 2019 IEEE
Access Condition Notes: Accepted manuscript available on open access