An up-to-date database will reduce the collision probability that could be caused by the lack of synchronization between the real state of the primary spectrum and the available information stored in the database.
It is a reasonable assumption since UL transmissions initiate after DL synchronization, which implies that the UL CFOs can only be caused by the Doppler effect or residual DL synchronization errors.
It might be caused by the vaccination.
To some extent this might have resulted from suboptimal synchronization, but it is likely that some of the discrepancy is caused by differences in the algorithms used to determine SR-BIS and SR-EEG.
We note here that the self interference also may be caused by imperfect synchronization, carrier frequency offset, and so forth, in addition to the imperfect channel estimation, but their analysis is out of the scope of this work.
This may be caused by noise or by the influence of synchronization treatment to the activity of transcription factors, which we will discuss in more detail in the next section.
Thus, we can conclude that the SR observed in these studies probably was caused by noise-induced changes in synchronization among cortical neurons.
The self interference may be caused by different factors such as imperfect synchronization, carrier frequency offset, in addition to channel estimation error, but the analysis taking into account their full impact on the performance is very difficult.
We note here that imperfect self-information removal may be caused by different factors such as imperfect synchronization, carrier frequency offset, imperfect knowledge of CSI, and so forth.
The conflict was caused by several factors.
