liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Cognitive Radio in a Frequency-Planned Environment: Some Basic Limits
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, The Institute of Technology.
Royal Institute of Technology (KTH).
2008 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, Vol. 7, no 12, 4800-4806 p.Article in journal (Refereed) Published
Abstract [en]

The objective of this work is to assess some fundamental limits for opportunistic spectrum reuse via cognitive radio in a frequency-planned environment. We present a first-order analysis of the signal-to-noise-and-interference situation in a wireless cellular network, and analyze the impact of cognitive users starting to transmit. Two main conclusions emerge from our study. First, obtaining any substantial benefits from opportunistic spatial spectrum reuse in a frequency-planned network without causing substantial interference is going to be very challenging. Second, the cognitive users need to be more sensitive, by orders of magnitude, than the receivers in the primary system, especially if there is significant shadow fading. This latter problem can be alleviated by having cognitive users cooperate, but only if they are separated far apart so that they experience independent shadowing.

Place, publisher, year, edition, pages
2008. Vol. 7, no 12, 4800-4806 p.
Keyword [en]
Wireless communications, cognitive radio
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-16352DOI: 10.1109/T-WC.2008.070928OAI: diva2:133969
©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Erik G. Larsson and Mikael Skoglund, Cognitive Radio in a Frequency-Planned Environment: Some Basic Limits, 2008, IEEE Transactions on Wireless Communications, (7), 12, 4800-4806. Available from: 2009-01-16 Created: 2009-01-16 Last updated: 2010-01-18

Open Access in DiVA

fulltext(300 kB)810 downloads
File information
File name FULLTEXT01.pdfFile size 300 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Larsson, Erik G.
By organisation
Communication SystemsThe Institute of Technology
In the same journal
IEEE Transactions on Wireless Communications
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 810 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 1123 hits
ReferencesLink to record
Permanent link

Direct link