TY - GEN
T1 - Optimal Interactive Energy Efficient Beam-Alignment for Millimeter-Wave Networks
AU - Hussain, Muddassar
AU - Michelusi, Nicolo
N1 - Funding Information:
An extended version of this paper appears on IEEE TWC [1]. M. Hussain and N. Michelusi are with the School of Electrical and Computer Engineering, Purdue University. email: {hussai13, michelus}@purdue.edu. This research has been funded by NSF under grant CNS-1642982.
Funding Information:
This research has been funded by NSF under grant CNS-1642982.
Publisher Copyright:
© 2018 IEEE.
PY - 2019/2/19
Y1 - 2019/2/19
N2 - Millimeter-wave communications rely on narrow-beam transmissions to cope with the strong signal attenuation at these frequencies, thus demanding precise alignment between transmitter and receiver. The beam-alignment procedure may create a significant overhead, thus potentially offsetting the benefits of using narrow communication beams. In this paper, an optimal interactive energy-efficient beam-alignment protocol is designed, that optimizes over the sequence of beams and the duration of beam-alignment, based on feedback received from the user-end (thus, interactive), so as to support a minimum communication rate. It is proved that a fixed-length fractional search method that decouples the beam-alignment of base-station and user-end is optimal. Numerical results using analog beams demonstrate the superior performance of our proposed fractional search: the conventional and interactive exhaustive search methods, and the bisection search method incur, respectively, 7. 5dB, 14dB and 4dB of additional power consumption compared to the proposed fractional search.
AB - Millimeter-wave communications rely on narrow-beam transmissions to cope with the strong signal attenuation at these frequencies, thus demanding precise alignment between transmitter and receiver. The beam-alignment procedure may create a significant overhead, thus potentially offsetting the benefits of using narrow communication beams. In this paper, an optimal interactive energy-efficient beam-alignment protocol is designed, that optimizes over the sequence of beams and the duration of beam-alignment, based on feedback received from the user-end (thus, interactive), so as to support a minimum communication rate. It is proved that a fixed-length fractional search method that decouples the beam-alignment of base-station and user-end is optimal. Numerical results using analog beams demonstrate the superior performance of our proposed fractional search: the conventional and interactive exhaustive search methods, and the bisection search method incur, respectively, 7. 5dB, 14dB and 4dB of additional power consumption compared to the proposed fractional search.
KW - beam-alignment
KW - Markov decision process
KW - Millimeter-wave
UR - http://www.scopus.com/inward/record.url?scp=85062973071&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062973071&partnerID=8YFLogxK
U2 - 10.1109/ACSSC.2018.8645195
DO - 10.1109/ACSSC.2018.8645195
M3 - Conference contribution
AN - SCOPUS:85062973071
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 577
EP - 581
BT - Conference Record of the 52nd Asilomar Conference on Signals, Systems and Computers, ACSSC 2018
A2 - Matthews, Michael B.
PB - IEEE Computer Society
T2 - 52nd Asilomar Conference on Signals, Systems and Computers, ACSSC 2018
Y2 - 28 October 2018 through 31 October 2018
ER -