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Implementation issues in spectrum sensing for cognitive radios
Abstract
There are new system implementation challenges involved in the design of cognitive radios, which have both the ability to sense the spectral environment and the flexibility to adapt transmission parameters to maximize system capacity while coexisting with legacy wireless networks. The critical design problem is the need to process multigigahertz wide bandwidth and reliably detect presence of primary users. This places severe requirements on sensitivity, linearity and dynamic range of the circuitry in the RF front-end. To improve radio sensitivity of the sensing function through processing gain we investigated three digital signal processing techniques: matched filtering, energy detection and cyclostationary feature detection. Our analysis shows that cyclostationary feature detection has advantages due to its ability to differentiate modulated signals, interference and noise in low signal to noise ratios. In addition, to further improve the sensing reliability, the advantage of a MAC protocol that exploits cooperation among many cognitive users is investigated.
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Cited by
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey
Akyildiz, I. F., Lee, W.-Y., Vuran, M. C., & Mohanty, S. (2006) · Computer Networks · doi:10.1016/j.comnet.2006.05.001 · Cited by 6,356
Beyond Nyquist: Efficient Sampling of Sparse Bandlimited Signals
Tropp, J. A., Laska, J. N., Duarte, M. F., Romberg, J. K., & Baraniuk, R. G. (2010) · IEEE Transactions on Information Theory · doi:10.1109/tit.2009.2034811 · Cited by 1,089
Cooperative Spectrum Sensing in Cognitive Radio, Part II: Multiuser Networks
Ganesan, G., & Ye, L. (2007) · IEEE Transactions on Wireless Communications · doi:10.1109/twc.2007.05776 · Cited by 873
Advances on Spectrum Sensing for Cognitive Radio Networks: Theory and Applications
Ali, A., & Hamouda, W. (2017) · IEEE Communications Surveys & Tutorials · doi:10.1109/comst.2016.2631080 · Cited by 624
Signal Processing in Cognitive Radio
Ma, J., Li, G. Y., & Juang, B. H. (2009) · Proceedings of the IEEE · doi:10.1109/jproc.2009.2015707 · Cited by 533
Metadata
- Authors
- Cabric, D., Mishra, S. M., & Brodersen, R. W.
- Venue
- Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004.
- Publisher
- IEEE
- Published
- 2005-03-31
- Volume
- 1
- Pages
- 772-776
- ISSN
- 1058-6393 (ISSN-L)
- OpenAlex
- W2170524206
- Cited by
- 2,589
- References
- 0
- FWCI
- 64.48
- Type
- conference paper
- Language
- en
- Open access
- closed
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- Cabric, D., Mishra, S. M., & Brodersen, R. W. (2005). Implementation issues in spectrum sensing for cognitive radios. Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004. https://doi.org/10.1109/acssc.2004.1399240
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