TY - GEN
T1 - MAC Layer Beamforming
T2 - 94th IEEE Vehicular Technology Conference, VTC 2021-Fall
AU - Tiwari, Krishan Kumar
AU - Laurenson, David
AU - Grass, Eckhard
AU - Thompson, John S.
AU - Ndip, Ivan
AU - Kaiser, Michael
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/12/10
Y1 - 2021/12/10
N2 - In this paper, we investigate the mean communication rate loss (MCRL) due to beam cusping with respect to multiple input multiple output (MIMO) spatial dimensions, beamforming codebook sizes, and beam scan spaces for beamforming operations controlled by the medium access control (MAC) layer beamforming protocol. The intractability of the analytical investigation for a closed-form expression leads to the usage of Monte Carlo numerical experiments. For discrete Fourier transform (DFT) beamforming codebooks, the MCRL increases with an increase in the MIMO dimensions while it decreases with an increase in the beam scan space from the array broadside. The MCRL becomes negligible as the number of beams for selection is increased to four times the number of DFT beams. These results will be helpful for determination of MIMO configuration, angular coverage zone, codebook size, and phase-shifter resolution for a minimal MCRL. This is especially relevant for sparse MIMO channels of millimetre-wave (mmWave) and terahertz (THz) wireless systems in the fifth generation (5G) and beyond mobile networks.
AB - In this paper, we investigate the mean communication rate loss (MCRL) due to beam cusping with respect to multiple input multiple output (MIMO) spatial dimensions, beamforming codebook sizes, and beam scan spaces for beamforming operations controlled by the medium access control (MAC) layer beamforming protocol. The intractability of the analytical investigation for a closed-form expression leads to the usage of Monte Carlo numerical experiments. For discrete Fourier transform (DFT) beamforming codebooks, the MCRL increases with an increase in the MIMO dimensions while it decreases with an increase in the beam scan space from the array broadside. The MCRL becomes negligible as the number of beams for selection is increased to four times the number of DFT beams. These results will be helpful for determination of MIMO configuration, angular coverage zone, codebook size, and phase-shifter resolution for a minimal MCRL. This is especially relevant for sparse MIMO channels of millimetre-wave (mmWave) and terahertz (THz) wireless systems in the fifth generation (5G) and beyond mobile networks.
KW - beam cusping loss
KW - MAC layer beamforming
KW - MIMO
KW - MmWave and THz communications
UR - http://www.scopus.com/inward/record.url?scp=85123011494&partnerID=8YFLogxK
U2 - 10.1109/VTC2021-Fall52928.2021.9625233
DO - 10.1109/VTC2021-Fall52928.2021.9625233
M3 - Conference contribution
AN - SCOPUS:85123011494
T3 - IEEE Vehicular Technology Conference
BT - 2021 IEEE 94th Vehicular Technology Conference, VTC 2021-Fall - Proceedings
PB - Institute of Electrical and Electronics Engineers
Y2 - 27 September 2021 through 30 September 2021
ER -