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Title: Discrete Phase Shift Design for Practical Large Intelligent Surface Communication
In this paper, we investigate a downlink channel of a large intelligent surface (LIS) communication system. The LIS is equipped with B-bit discrete phase shifts while base station (BS) exploits low-resolution digital-to-analog converters (DACs). Without the knowledge of channel state information (CSI) related to the LIS, we propose a practical phase shift design method, whose computational complexity increases by 2 B independent of the number of reflecting elements N. A tight lower bound for the asymptotic rate of the user is obtained in closed form. As N increases, we observe that the asymptotic rate becomes saturated because both the received signal power and the DAC quantization noise increase. Compared to the optimal continuous phase shift design with perfect CSI, our proposed method asymptotically approaches the ideal benchmark performance for moderate to high values of B. The derived results and observations are verified by simulation results.  more » « less
Award ID(s):
1703635 1824565
PAR ID:
10155038
Author(s) / Creator(s):
; ;
Date Published:
Journal Name:
Proc. IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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