Signal Detection Based on Walsh Transform for Spectrum Sensing


Spectrum sensing is a key technology to improve spectrum efficiency. In this paper, we propose a novel signal detection method based on Walsh transform for spectrum sensing. The main idea behind is that the received signal is transformed into another domain by Walsh transform and the test statistic is obtained by exploiting the feature of the useful signal in the new domain. The new method can perform well at low signal-to-noise rate (SNR). Simulation results show that the proposed method has better performance than the spectral feature detection based on power spectrum.

Share and Cite:

Yang, G. , Ren, G. and Wu, K. (2013) Signal Detection Based on Walsh Transform for Spectrum Sensing. Communications and Network, 5, 386-389. doi: 10.4236/cn.2013.53B2070.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] T. Cui, J. Tang and F. Gao, “Blind Spectrum Sensing in Cognitive Raio,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC). 2010.
[2] S. Haykin, “Cognitive Radio: Brain-empowered Wireless communications,” IEEE J. Sel. Areas Commun, Vol. 23, 2005, pp. 201-220. doi:10.1109/JSAC.2004.839380
[3] F. F. Digham, M. S. Alouini and M. K. Simon, “On the Energy Detection of Unknown Signals over Fading Channels,” IEEE International Conference on Communications (ICC’03), pp. 3575-3579, May 2003.
[4] Z. Quan, W. Zhang, S. Shellhammer and A. H. Sayed, “Optimal Spectral Feature Detection for Spectrum Sensing at very Low SNR,” IEEE Transactions Communications, Vol. 59, 2001, pp. 201-212. doi:10.1109/TCOMM.2010.112310.090306
[5] W. A. Gardner and C. M. Spooner, “Signal Interception: Performance Advantages of Cyclic Feature Detectors,” IEEE Transactions Communications, Vol. 40, 1992, pp. 149-159. doi:10.1109/26.126716
[6] K. G. Beauchamp, application of Walsh and Related Functions. New York: Academic, 1984.
[7] R. F. Mills and G. E. Prescon, “A Comparison of Various Radiometer Detection Models,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 32, No. 1, 1996, pp. 467-473. doi:10.1109/7.481289

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.