Analysis and Implementation of Reliable Spectrum Sensing in OFDM Based Cognitive Radio

Cognitive radio (CR) provides better utilization of the spectrum by sensing the presence of free spectrum and assigning it to the unlicensed user temporarily when licensed users are not using the spectrum. Cyclostationary sensing method will be used here because it can differentiate between noise and the primary user (PU) signal. This technique is independent of the type of modulation used so at the receiver side no prior information on PU signal is required. Cyclostationary spectrum sensing is the preferred method for the sensing of multicarrier modulated signals, so also used for the sensing of OFDM signals and its standards. The aim of this project is to find the presence of a PU signal in a given spectrum. For this purpose probability of detection of the PU is calculated for various values of signal-to-noise ratio (SNR). Different OFDM modulated signals can also be differentiated using this method.

[1]  S. G. Mohapatra,et al.  Performance evaluation of cyclostationary based spectrum sensing in cognitive radio network , 2013, 2013 International Mutli-Conference on Automation, Computing, Communication, Control and Compressed Sensing (iMac4s).

[2]  Marko Kosunen,et al.  Correlation-Based Detection of OFDM Signals in the Angular Domain , 2012, IEEE Transactions on Vehicular Technology.

[3]  Marko Kosunen,et al.  Implementation of Cyclostationary Feature Detector for Cognitive Radios , 2009, 2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications.

[4]  M. V. Raghunadh,et al.  Spectrum Sensing Based on Cyclostationary Detector using USRP , 2014 .

[5]  Hüseyin Arslan,et al.  A survey of spectrum sensing algorithms for cognitive radio applications , 2009, IEEE Communications Surveys & Tutorials.

[6]  Yonghong Zeng,et al.  Sensing-Throughput Tradeoff for Cognitive Radio Networks , 2008, IEEE Trans. Wirel. Commun..

[7]  Ian F. Akyildiz,et al.  NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey , 2006, Comput. Networks.

[8]  Mikko Valkama,et al.  Simultaneous Transmission and Spectrum Sensing in OFDM Systems Using Full-Duplex Radios , 2015, 2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall).