Cooperative schemes have more communication overhead than non-cooperative solutions but may result in higher spectrum usage efficiency and sensing accuracy [4].
Meanwhile, by using an interference alignment (IA) transmission mode within small scale clusters, D2D users could transmit its data in higher spectrum efficiency.
Notice that the FitError feature in itself is not very informative, because a high FitError cannot distinguish between components with a large alpha peak (which contain most probably neural activity) and components with an unusual high spectrum in higher frequency (which indicates muscle activity).
The author in [4] proposed a high spectrum efficient multiple access code.
From this derivation, we also notice that with the increase of N, besides the mainlobe becomes narrower, the central value of the PSD gets higher, which results in a higher spectrum efficiency.
A hot spot could e.g. be a large matrix crystal, that was hit directly by the laser beam, resulting in a higher spectrum intensity at this point.
There is a pronounced, permanent, variable frequency banded enhancement in high frequency spectra recorded in the ionospheric electron plasma on APEX and CORONAS-I.
Although many spots resulted in high quality spectra, they were not identified which may be due to insufficient amounts of protein, modification and/or variation of the amino acid sequences in CHO proteins or the paucity of CHO proteins in the protein databases.
There is a tradeoff between small steps, which take more scanning time, but result in higher transmission spectrum resolution and large steps, which take less scanning time but produce lower transmission spectrum resolution.
As the season changes, the shifting in solar spectrum can be seen in the magnitude of APE. Figure 5 shows that APE values were low in the winter season, indicating more energy in higher wavelength spectrum bands.
