Also, considering the importance of technical innovation, Member States should be able to issue authorisations to use spectrum for experimental purposes, subject to specific restrictions and conditions strictly justified by the experimental nature of such rights.
For classification purposes, each spectrum was assigned a class label (1 for cancer and 2 for normal).
The use of cyclostationarity for the purpose of spectrum sensing has been investigated from a variety of perspectives ranging from single node signal detection [9 16] to collaborative approaches that take use of the spatial diversity [17, 18].
As well known, the final purpose of spectrum sensing is to find the spectrum access opportunities for SUs [1, 5].
For display purposes, the spectra were normalized so that the total area under the curve was equal to one (i.e., probability density functions).
Hence, applying Fourier transform to correlation vector of pavement surface, commonly known as power spectral density, does serve the purpose of spectrum analysis in theory [30].
For the purpose of spectrum monitoring the proposed sensing method is required to operate satisfactory in the lower SNR regime as well.
These sensing devices can be installed as part of the infrastructure for the sole purpose of spectrum sensing [9], or existing user devices can be involved through a crowdsourcing approach [10].
We should also consider the possibility that there is another, relatively weak PU signal, using one of the WLAN channels 4…7, and fully or partly occupying the gap between channels 3 and 8. Thus, one purpose of spectrum sensing is to secure that there are no other PUs active in the considered gap.
For this purpose, theSPLand spectra were computed theoretically and the values were compared to measured results for several types of fans with various blade spacing.
