Abstract
The wireless spectrum being a scanty resource needs to cater up for stipulated number of devices. But with wireless devices becoming pervasive, the provision of spectrum for such a substantial number seems to be a daunting task. Cognitive radio is a technology which uses the spectrum smartly either by sensing the spectrum hole in order to transmit the data or by sharing the available spectrum among two or more users. Hence cognitive radio is indispensible for the spectrum prerequisites. But the main problem is the phenomenon of cognitive interference. Precoded OFDM (Orthogonal Frequency Division Multiplexing) is found to eliminate the interference by such a way that it gets cancelled as it is propagated. The precoded OFDM is similar to that of the VFDM system except for the fact that the secondary receiver does not requires to know the channel state information but only in which mode the transmitter is being operated. This work comprises of the analysis of BER (Bit Error Rate) performance of the Precoded system in AWGN (Additive White Gaussian Noise), Rayleigh and Rician channels using MATLAB.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Kolodzy, P., et al.: Next Generation Communications: Kickoff meeting. In: Proc. DARPA (October 17, 2001)
Devroye, N., Mitran, P., Tarokh, V.: Achievable rates in cognitive radio channels. IEEE Trans. on Inform. Theory 52(5), 1813–1827 (2006)
Molisch, A.F.: Wireless Communications, 2nd edn. Wiley (2011)
Dutta, A., Saha, D., Grunwald, D., Sicker, D.: Practical implementation of Blind Synchronization in NC-OFDM based Cognitive Radio Networks. In: CoRoNet 2010, Chicago, Illinois, USA (September 20, 2010)
Cardoso, L.S., Kobhayashi, M., Debbah, M.: Vondermonde Frequency Division Multiplexing for Cognitive Radio. arXiv:0803.0875v1 [cs. IT] (March 2008)
Cardoso, L.S., Cavalcanti, F.R.P., Kobayashi, M., Debbah, M.: Vondermonde-subspace Frequency Division Multiplexing receiver analysis. In: PIMRC, 2010 IEEE 21 International Symposium on Istanbul, Turkey (2010)
Maso, M., Cardoso, L.S., Bastug, E., Linh-Trung, N., Debbah, M., Ozdemir, O.: On the Practical Implementation of VFDM Based Oppurtunistic Systems: Issues and Challenges. REV Journal on Electronics and Communication 2(1-2) (January-June 2012)
Bokharaiee, S., Nguyen, H.H., Shwedyk, E.: Blind Spectrum Sensing for OFDM –Based Cognitive Radio System. IEEE Transaction on Vehicular Technology 60(3) (March 2011)
Ahmed, I., Arslan, T.: Design of multi standard turbo decoder for 3G and beyond, 1-4244-0630-7/07. IEEE (2007)
Zou, D., Lu, X., Xu, J., Wu, H.: Application of IFFT Based on CORDIC Algorithms in OFDM-UWB System. IEEE (2008)
Badoi, C.-I., Prasad, N., Croitoru, V., Prasad, R.: 5G based on Cognitive Radio. Wireless Pers. Communication (2011)
Mitola III, J.: Cognitive Radio for flexible mobile multimedia Communication. Moblie Networks and Application 6, 435–441 (2001)
Cabric, D., Mishra, S.M., Brodersen, R.W.: Implementation issues in spectrum sensing for Cognitive radio
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer International Publishing Switzerland
About this paper
Cite this paper
Padmanabhan, S.K., Prasad, T.J. (2014). Novel Precoded OFDM for Cognitive Radio in Noisy and Multipath Channels. In: SwiÄ…tek, J., Grzech, A., SwiÄ…tek, P., Tomczak, J. (eds) Advances in Systems Science. Advances in Intelligent Systems and Computing, vol 240. Springer, Cham. https://doi.org/10.1007/978-3-319-01857-7_25
Download citation
DOI: https://doi.org/10.1007/978-3-319-01857-7_25
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-01856-0
Online ISBN: 978-3-319-01857-7
eBook Packages: EngineeringEngineering (R0)