Abstract
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.
Original language | English |
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Pages (from-to) | 4-15 |
Number of pages | 12 |
Journal | Wireless Communications and Mobile Computing |
Volume | 10 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2010 |
ASJC Scopus Subject Areas
- Information Systems
- Computer Networks and Communications
- Electrical and Electronic Engineering
Keywords
- Cognitive radio
- Frequency hopping
- GNU software radio
- Interference avoidance
- Software-defined radio
Disciplines
- Electrical and Computer Engineering