Spatial capacity of cognitive radio networks: Narrowband versus ultra-wideband systems
Document Type
Conference Proceeding
Publication Date
11-27-2007
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. © 2007 IEEE.
Publication Title
IEEE Wireless Communications and Networking Conference, WCNC
Recommended Citation
Zhang, D.,
&
Tian, Z.
(2007).
Spatial capacity of cognitive radio networks: Narrowband versus ultra-wideband systems.
IEEE Wireless Communications and Networking Conference, WCNC, 6-10.
http://doi.org/10.1109/WCNC.2007.7
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/11205