NDLI: Sidestepping the Rayleigh limit for LoS spatial multiplexing: A distributed architecture for long-range wireless fiber

Content Provider	IEEE Xplore Digital Library
Author	Irish, A. Quitin, F. Madhow, U. Rodwell, M.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of California, Santa Barbara, Santa Barbara, CA, USA (Irish, A.; Quitin, F.; Madhow, U.; Rodwell, M.)
Abstract	While existing wireless systems rely on rich scattering environments to obtain spatial multiplexing gains, such gains are also available for line-of-sight (LoS) point-to-point links if the range is small enough. For fixed antenna separation (limited by node form factor) and carrier frequency (limited by available electronics), the range up to which multiple degrees of freedom are available is limited by the Rayleigh criterion. In this paper, we propose a distributed architecture for sidestepping this criterion, leading to spatial multiplexing gains at ranges much larger than those dictated by node form factor and carrier frequency constraints. Although the antenna spacings at the transmitter and the receiver are not large enough to support spatial multiplexing, the use of relays spread out over a larger area enables synthesis of a full rank MIMO channel. We focus specifically on the design of air-to-ground wireless fiber links over ranges of tens of kilometers, which have the following features in addition to relay-enabled spatial multiplexing: (a) the small carrier wavelength enables large beamforming gains even for nodes of compact form factor, (b) the large available bandwidths enable multiGigabit speeds for each spatially multiplexed data stream.
Starting Page	1
Ending Page	6
File Size	199633
Page Count	6
File Format	PDF
ISBN	9781467346481
e-ISBN	9781467346474
DOI	10.1109/ITA.2013.6502954
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-02-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiplexing Transmitters Array signal processing Receivers MIMO Arrays Relays
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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