Title :
Real time hardware implementable spectrum sensor for Cognitive Radio applications
Author :
Chaitanya, G.V. ; Rajalakshmi, P. ; Desai, U.B.
Author_Institution :
Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Warangal, India
Abstract :
A fundamental problem for Cognitive Radios (CR) is spectrum sensing, secondary users need to reliably detect weak primary signals of possibly different types over a targeted wide frequency band in order to identify spectral holes for opportunistic communications. In this paper energy detection technique based on Neyman-Pearson criterion is implemented to detect the presence of deterministic primary user (PU) signals in the channel. We designed a hardware implementable energy detector on a wireless testbed software defined radio (SDR) using USRP2 and an experimental study is carried out to measure the required SNR to achieve the desired probability of detection and false alarm. A comparative study was also made between the SNRs obtained from frequency and time domain analysis.
Keywords :
cognitive radio; frequency-domain analysis; probability; signal detection; time-domain analysis; Neyman-Pearson criterion; USRP2; cognitive radio application; detection probability; deterministic primary user signal detection; energy detection technique; false alarm probability; frequency-domain analysis; opportunistic communications; real time hardware implementable spectrum sensor; secondary users; spectral hole identification; spectrum sensing; time-domain analysis; weak primary signal detection; wireless testbed software defined radio; Detectors; Hardware; OFDM; Receivers; Signal to noise ratio; Software packages; Cognitive Radio; Energy detection; FPGA; Hardware Co-simulation; SDR; Spectrum Sensing;
Conference_Titel :
Signal Processing and Communications (SPCOM), 2012 International Conference on
Conference_Location :
Bangalore
Print_ISBN :
978-1-4673-2013-9
DOI :
10.1109/SPCOM.2012.6290024
