Frontiers of Electrical and Electronic Engineering >

2010 , Vol. 5 >Issue 4: 456 - 463

DOI: https://doi.org/10.1007/s11460-010-0111-1

RESEARCH ARTICLE

An efficient cooperative sensing scheme with bandwidth-limited control channel

  • Guizhu FENG ,
  • Wei CHEN ,
  • Zhigang CAO
Expand
  • Tsinghua National Laboratory for Information Science and Technology (TNList), State Key Laboratory on Microwave and Digital Communications, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Received date: 17 Mar 2010

Accepted date: 21 May 2010

Published date: 05 Dec 2010

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
Fold

Abstract

The conflict between scarcity of spectrum resources and low spectrum utilization motivates the concept of cognitive radio, which allows secondary unlicensed users to borrow temporally unused spectrum bands from primary licensed users. Spectrum sensing is one of the key functionalities that enable spectrum hole discovery and interference avoidance. As single user spectrum sensing may experience performance degradation in harsh wireless environment due to fading and shadowing, user cooperation is introduced to exploit spatial diversity for better sensing performance. However, local sensing results must be transmitted via a control channel. The advantage of cooperative sensing can be compromised by bandwidth limitation of the control channel. To overcome this, a benching cooperative sensing scheme is proposed in this paper. This scheme can reduce time overhead of sensing information exchange under a communication constraint. Analytical results of periodic sensing efficiency are then deduced while sensing parameters are optimized. Based on these, a recursive sensing algorithm exploiting prior channel state information is developed. Numerical results are presented to demonstrate the potential of our scheme.

Key words： cognitive radio; cooperative sensing; energy detection; data fusion

Cite this article

Guizhu FENG , Wei CHEN , Zhigang CAO . An efficient cooperative sensing scheme with bandwidth-limited control channel[J]. Frontiers of Electrical and Electronic Engineering, 2010 , 5(4) : 456 -463 . DOI: 10.1007/s11460-010-0111-1

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 60832008 and 60902001).

References

Publishing order | Descend order by publishing year | Descend order by cited within
1
Cabric D, Mishra S M, Brodersen R W. Implementation issues in spectrum sensing for cognitive radios. In: Proceedings of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers. 2004, 1: 772–776

2
Ganesan G, Li Y. Cooperative spectrum sensing in cognitive radio networks. In: Proceedings of the First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks. 2005, 137–143

3
Ghasemi A, Sousa E S. Collaborative spectrum sensing for opportunistic access in fading environments. In: Proceedings of the First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks. 2005, 131–136

4
Lataief K B, Zhang W. Cooperative spectrum sensing. Cognitive Wireless Communication Networks. New York: Springer, 2007, 115–138

DOI

5
Quan Z, Cui S, Sayed A H. Optimal linear cooperation for spectrum sensing in cognitive radio networks. IEEE Journal of Selected Topics in Signal Processing, 2008, 2(1): 28–40

DOI

6
Liang Y C, Zeng Y, Peh E C Y, Hoang A T. Sensing-throughput tradeoff for cognitive radio networks. IEEE Transactions on Wireless Communications, 2008, 7(4): 1326–1337

DOI

7
Ghasemi A, Sousa E S. Spectrum sensing in cognitive radio networks: the cooperation-processing tradeoff. Wireless Communications and Mobile Computing, 2007, 7(9): 1049–1060

DOI

8
Urkowitz H. Energy detection of unknown deterministic signals. Proceedings of the IEEE, 1967, 55(4): 523–531

DOI

Options
Outlines

/

〈 〉