Fig. 1 Periodical spectrum sensing and simultaneous sensing/transmitting. Compare the periodical spectrum and simultaneous sensing/transmitting at the same spectrum hole duration, we can find that the simultaneous sensing provides a higher spectrum utilization and less interference to PU.
The emission spectrum of PpIX photoproducts was obtained by subtracting from the emission spectrum at 634 nm the same spectrum after a continuous irradiation at a power of 36 mW during 1 min. The photoproducts spectrum [ 15] was not measured for the emission spectrum with a maximum at 620 nm because no photo-bleaching was noticeable.
D indicates that the peptide was identified by at least one same spectrum in both X!Tandem and Omssa search engines.
Mr. Wright seems unfazed by the contrast between this role and the one that followed; to him they sit at opposite ends of the same spectrum.
As a result, SUs may access the licensed spectrum without causing harmful interference at the PUs, even if the PUs are also using the same spectrum at the same time.
At the 1997 World Radio Conference France was able to secure agreement for Alcatel-Alsthom to launch a non-geostationary satellite system (called SkyBridge) operating at Ku-band, and utilizing the same spectrum as employed by the existing Ku-band geostationary satellites.
Many years ago, I attended a seminar by local researcher Michael Hayden about using very rare genetic disorders on one end of a spectrum to find new ways to fight very common disorders at the other end of the same spectrum.
Communication protocol for the bi-directional CR system with WNC protocol, in which both SUs of the given pair access the same spectrum at the same time, is done over multiple time slots, as shown in Table1.
Research in recent years [1 12] has investigated the possibility of wireless equipment operating in full-duplex mode, meaning that the transceiver will both transmit and receive at the same time and in the same spectrum.
Interestingly, when the compound is exposed to oxygen, this spectrum slowly loses its broad maximum, and after some hours, virtually the same spectrum as at the beginning of the experiment was obtained.
