A software-defined radio based cognitive radio demonstration over FM band

In this paper, we present a software-defined radio (SDR) based cognitive radio (CR) implementation and demonstration over the frequency modulation (FM) band. Using GNU Radio as the software platform and USRP (Universal Software Radio Peripheral) SDR boards as the hardware solution, we implement and demonstrate a CR that autonomously senses the entire FM band, detects all the active FM stations (occupied bands) as well as the spectrum holes (non-occupied bands), exploits the available spectrum holes to transmit secondary users’ data without interference with the existing FM transmission. Moreover, we demonstrate that when a primary user’s transmission returns to its allocated spectrum band after a period of absence, the CR automatically adapts its transmission and hands off to a different spectrum hole that is available to avoid interference with the returning primary user. Moreover, we have proposed, implemented, and demonstrated a frequency hopping scheme over multiple spectrum holes to support multiple secondary users while attaining the minimum interference among the users. Copyright © 2009 John Wiley & Sons, Ltd.

[1]  Charles W. Bostian,et al.  Cognitive Radio Formulation and Implementation , 2006, 2006 1st International Conference on Cognitive Radio Oriented Wireless Networks and Communications.

[2]  Joseph Mitola.  Cognitive Radio for Flexible Mobile Multimedia Communications , 2001, Mob. Networks Appl..

[3]  Lee Kenneth Patton,et al.  A GNU Radio Based Software-Defined Radar , 2007 .

[4]  Mark Pilgrim,et al.  Dive Into Python , 2004, Apress.

[5]  Joseph Mitola,et al.  Cognitive Radio An Integrated Agent Architecture for Software Defined Radio , 2000 .

[6]  C.W. Bostian,et al.  Cognitive radio testbed: further details and testing of a distributed genetic algorithm based cognitive engine for programmable radios , 2004, IEEE MILCOM 2004. Military Communications Conference, 2004..

[7]  Kok-Lim Alvin Yau,et al.  A context-aware and Intelligent Dynamic Channel Selection scheme for cognitive radio networks , 2009, 2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications.

[8]  Xue Li,et al.  Cognitive Radio Centric Overlay/Underlay Waveform , 2008, 2008 3rd IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks.

[9]  Rodger E. Ziemer,et al.  Orthogonal frequency division multiplexing performance in delay and Doppler spread channels , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.