NDLI: Spatial Capacity of Cognitive Radio Networks: Narrowband Versus Ultra-Wideband Systems

Content Provider	IEEE Xplore Digital Library
Author	Duo Zhang Zhi Tian
Copyright Year	2007
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Michigan Technol. Univ., Houghton, MI (Duo Zhang; Zhi Tian)
Abstract	For cognitive wireless networks, this paper analyzes the achievable sum capacity of spectrum-sharing cognitive radio (CR) networks, taking into account of a number of factors including channel multipath profile, transmit power constraints, as well as the outage probability at a primary legacy user. Two transmission formats, narrowband versus ultra-wideband, are compared for adoption in CRs. Capacity analysis indicates that ultra-wideband CRs are in general more suitable for networks operating over licensed bands, when strict outage requirements are imposed for protecting primary users. On license-free bands, on the other hand, narrowband CRs employing orthogonal channelization offer higher network capacity, while its ultra-wideband counterparts become competitive only when the multipath effect is moderate. In the presence of primary users, the interference temperature constraint deteriorates a narrowband cognitive network more than its ultra-wideband counterpart.
Starting Page	6
Ending Page	10
File Size	189273
Page Count	5
File Format	PDF
ISBN	1424406587
ISSN	15253511
DOI	10.1109/WCNC.2007.7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-11
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cognitive radio Narrowband Ultra wideband technology Chromium Spread spectrum communication Interference constraints Capacity planning Power system protection Frequency conversion Communications Society
Content Type	Text
Resource Type	Article

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