A spectrum-shaping perspective on cognitive radio: Uncoded primary transmission case

Author

Zhang, Wenyi ; Mitra, Urbashi

Author_Institution

Ming Hsieh Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA

fYear

2008

fDate

6-11 July 2008

Firstpage

1338

Lastpage

1342

Abstract

A new perspective on cognitive radio is presented for the case where the primary transmission is in uncoded analog form. The basic idea is to exploit signal-to-noise ratio margins in primary receivers, and to optimize cognitive signals by appropriately shaping their spectrum. It is shown that coexistence of primary and cognitive users is possible even without message-sharing, and furthermore, the cognitive user is no longer interference-limited, but can always transmit at its full available power thus achieving logarithmic growth of its information rate as its average power constraint grows large.

Keywords

cognitive radio; radio receivers; cognitive radio; cognitive signals; logarithmic growth; primary receivers; spectrum-shaping perspective; uncoded analog form; uncoded primary transmission case; Channel state information; Cognitive radio; Information rates; Instruments; Interference constraints; Pressing; Receivers; Signal to noise ratio; Temperature; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2008. ISIT 2008. IEEE International Symposium on

Conference_Location

Toronto, ON

Print_ISBN

978-1-4244-2256-2

Electronic_ISBN

978-1-4244-2257-9

Type

conf

DOI

10.1109/ISIT.2008.4595205

Filename

4595205