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.
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Padmanabhan, S.K., Prasad, T.J. (2014). Novel Precoded OFDM for Cognitive Radio in Noisy and Multipath Channels. In: Swiątek, J., Grzech, A., Swiątek, 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
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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
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