Cooperative Spectrum Sensing Scheme with Hard Decision Based on Location Information in Cognitive Radio Networks

Without an efficient way to achieve the reliability of the decision, the implementation of weighted data fusion is limited in the hard decision combination for cooperative spectrum sensing. To address this problem, a new cooperative spectrum sensing scheme based on the location information of the primary user (PU) and cognitive radio (CR) is proposed. In the new scheme, depending on the location information, the channel condition between the PU and each CR is obtained at the fusion center (FC), with which the local sensing reliability is first achieved. Then we calculate the transmission reliability between the CR and FC. Based on both the local sensing reliability and the transmission reliability, the combining weighting factor is determined for optimal data fusion. On the basis of this proposed scheme, we study the global sensing false alarm and detection probabilities, derive the expressions to obtain the optimal local sensing threshold, and perform an error analysis that demonstrates the impact of imperfect channel knowledge. Using both analytical and simulation methods, we find that the proposed scheme achieves better performance compared with the conventional logical fusion rules in the hard decision combination for cooperative spectrum sensing.

[1]  Teng Joon Lim,et al.  Cooperative Spectrum Sensing in Cognitive Radios With Incomplete Likelihood Functions , 2010, IEEE Transactions on Signal Processing.

[2]  K. V. Lever.  New derivation of Craig's formula for the Gaussian probability function , 1998 .

[3]  Hasari Celebi,et al.  Location awareness in cognitive radio networks , 2008 .

[4]  Ronald F. Boisvert,et al.  NIST Handbook of Mathematical Functions , 2010 .

[5]  Li-Chun Wang,et al.  Effects of Location Awareness on Concurrent Transmissions for Cognitive Ad Hoc Networks Overlaying Infrastructure-Based Systems , 2009, IEEE Transactions on Mobile Computing.

[6]  Mohamed-Slim Alouini,et al.  On the Energy Detection of Unknown Signals Over Fading Channels , 2007, IEEE Transactions on Communications.

[7]  Geoffrey Ye Li,et al.  Soft Combination and Detection for Cooperative Spectrum Sensing in Cognitive Radio Networks , 2008, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.

[8]  H Arslan,et al.  Cognitive-Radio Systems for Spectrum, Location, and Environmental Awareness , 2010, IEEE Antennas and Propagation Magazine.

[9]  R.W. Brodersen,et al.  Implementation issues in spectrum sensing for cognitive radios , 2004, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004..

[10]  Shuguang Cui,et al.  Optimal Linear Cooperation for Spectrum Sensing in Cognitive Radio Networks , 2008, IEEE Journal of Selected Topics in Signal Processing.

[11]  Andrea Goldsmith,et al.  Wireless Communications , 2005, 2021 15th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS).

[12]  Hugh F. Durrant-Whyte,et al.  A solution to the simultaneous localization and map building (SLAM) problem , 2001, IEEE Trans. Robotics Autom..

[13]  Thomas Kürner,et al.  Concepts and Results for 3D Digital Terrain-Based Wave Propagation Models: An Overview , 1993, IEEE J. Sel. Areas Commun..

[14]  Hüseyin Arslan,et al.  Cognitive Positioning Systems , 2007, IEEE Transactions on Wireless Communications.

[15]  Hassan M. El-Sallabi,et al.  Influence of diffraction coefficient and corner shape on ray prediction of power and delay spread in urban microcells , 2002 .

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

[17]  K. B. Letaief,et al.  Optimization of cooperative spectrum sensing with energy detection in cognitive radio networks , 2009, IEEE Transactions on Wireless Communications.

[18]  Friedrich Jondral.  Cognitive Radio: A Communications Engineering View , 2007, IEEE Wireless Communications.

[19]  Rohit U. Nabar,et al.  Introduction to Space-Time Wireless Communications , 2003 .

[20]  W. Wiesbeck,et al.  Capability of 3-D Ray Tracing for Defining Parameter Sets for the Specification of Future Mobile Communications Systems , 2006, IEEE Transactions on Antennas and Propagation.

[21]  E. Visotsky,et al.  On collaborative detection of TV transmissions in support of dynamic spectrum sharing , 2005, First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005..

[22]  H. Urkowitz.  Energy detection of unknown deterministic signals , 1967 .

[23]  Insoo Koo,et al.  An enhanced cooperative spectrum sensing scheme based on evidence theory and reliability source evaluation in cognitive radio context , 2009, IEEE Communications Letters.

[24]  Hüseyin Arslan,et al.  Utilization of Location Information in Cognitive Wireless Networks , 2007, IEEE Wireless Communications.

[25]  Tho Le-Ngoc,et al.  Capacity- and Bayesian-Based Cognitive Sensing with Location Side Information , 2011, IEEE Journal on Selected Areas in Communications.

[26]  Ian F. Akyildiz,et al.  A survey on spectrum management in cognitive radio networks , 2008, IEEE Communications Magazine.

[27]  Mohamed-Slim Alouini,et al.  Digital Communication Over Fading Channels: A Unified Approach to Performance Analysis , 2000 .

[28]  Duan-Shin Lee,et al.  Bandwidth-reservation scheme based on road information for next-generation cellular networks , 2004, IEEE Transactions on Vehicular Technology.

[29]  Hüseyin Arslan,et al.  Exploiting location awareness toward improved wireless system design in cognitive radio , 2008, IEEE Communications Magazine.

[30]  Gordon L. Stüber,et al.  Analysis of a direct-sequence spread-spectrum cellular radio system , 1993, IEEE Trans. Commun..

[31]  Anant Sahai,et al.  Cooperative Sensing among Cognitive Radios , 2006, 2006 IEEE International Conference on Communications.

[32]  Pramod K. Varshney,et al.  Further Results on the Optimality of the Likelihood-Ratio Test for Local Sensor Decision Rules in the Presence of Nonideal Channels , 2009, IEEE Trans. Inf. Theory.

[33]  Wei Zhang,et al.  Cooperative Spectrum Sensing for Cognitive Radios under Bandwidth Constraints , 2007, 2007 IEEE Wireless Communications and Networking Conference.

[34]  Shuguang Cui,et al.  Optimal Linear Fusion for Distributed Detection Via Semidefinite Programming , 2010, IEEE Transactions on Signal Processing.

[35]  P.K. Varshney,et al.  Optimal Data Fusion in Multiple Sensor Detection Systems , 1986, IEEE Transactions on Aerospace and Electronic Systems.