Research Article
A Demonstration of Adaptive Spectrum Sensing and Interference Suppressed Opportunistic Secondary Transmission
@INPROCEEDINGS{10.4108/icst.crowncom.2011.245920, author={Samson Sequeira and Srinivas Pinagapany and Yasunori Futatsugi and Masayuki Ariyoshi and Predrag Spasojevic}, title={A Demonstration of Adaptive Spectrum Sensing and Interference Suppressed Opportunistic Secondary Transmission}, proceedings={CrownCom Demonstration}, publisher={IEEE}, proceedings_a={CROWNCOM DEMONSTRATION}, year={2012}, month={5}, keywords={cognitive radio interference suppression spectrum sensing GNU radio}, doi={10.4108/icst.crowncom.2011.245920} }- Samson Sequeira
Srinivas Pinagapany
Yasunori Futatsugi
Masayuki Ariyoshi
Predrag Spasojevic
Year: 2012
A Demonstration of Adaptive Spectrum Sensing and Interference Suppressed Opportunistic Secondary Transmission
CROWNCOM DEMONSTRATION
ICST
DOI: 10.4108/icst.crowncom.2011.245920
Abstract
We consider spectrum sensing and Non-Contiguous OFDM) with interference avoidance to facilitate opportunistic secondary transmission. In this application protecting an incumbent primary user of the spectrum from secondary emissions is a key design requirement. We present an adaptive sense-and-carefully-transmit system which integrates a spectrum sensing module with an NC-OFDM transmitter having a powerful interference avoidance capability. The spectrum sensing module uses a rank-order filtering (ROF) algorithm to automatically set the detection threshold. The interference suppression capability of the NC-OFDM transmitter is enhanced using a technique called Interference Avoidance using Partitioned Frequency and Time domain processing (IA-PFT). We have implemented our Dynamic Spectrum Access (DSA) protocol using the GNU Radio-USRP2 platform. We demonstrate the DSA system performance by experiments performed in the ORBIT Testbed, WINLAB, Rutgers University.