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An algorithm approach to optical true time delay pool enabled centralized control beamforming for wireless base station
Author(s): Ruofan Wang; Chongfu Zhang; Huan Huang; Zichuan Yi; Kun Qiu
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Paper Abstract

In this paper, we propose an optimized approach to generation algorithm of optical true time delay pool (OTTD-P), by building the forbidden wavelength spacing matrixes (FWSMs), for the centralized control of beamforming (CCBF) system. In this optimized generation algorithm, we simplify the complex processes in the traversal process by FWSMs, so only a simple 0/1 decision is needed in the traversal cycle. And the design of OTTD-P correspondingly changes into a compatibility problem of the wavelength sequence heads. Moreover, a proof-of-concept CCBF system with 8-element phased array antennas is demonstrated to verify the feasibility of the optimized generation algorithm, in which 12 basic beam directions based on a 29.5 GHz millimeter wave signal are formed to provide a 360-degree beam steering. The time complexity of processes in the traversal algorithm is about 7×1023 steps which is a product of 2376 steps in the verification process and 3×1020 steps in the traversal process. But the time complexity is only about 2×1010 steps in the optimized generation algorithm. Finally, based on the optimized generation algorithm, a compression of needed optical wavelengths can be achieved and the rate of compressed-to-uncompressed (CTU) optical wavelengths decreases from 95% to 19% with the increasing beam directions.

Paper Details

Date Published: 14 February 2019
PDF: 4 pages
Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110480S (14 February 2019); doi: 10.1117/12.2519434
Show Author Affiliations
Ruofan Wang, Univ. of Electronic Science and Technology of China (China)
Chongfu Zhang, Univ. of Electronic Science and Technology of China (China)
Huan Huang, Univ. of Electronic Science and Technology of China (China)
Zichuan Yi, Univ. of Electronic Science and Technology of China (China)
Kun Qiu, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 11048:
17th International Conference on Optical Communications and Networks (ICOCN2018)
Zhaohui Li, Editor(s)

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