Block unwelcome calls by rerouting designated numbers. The blocked caller will hear a polite short message stating that you are not receiving calls at the moment. VIP Ringing Assign a unique ringtone to a specific number to identify the call without needing Caller ID. ...
The guide also still displays channel numbers, which are worthless without a remote that has number keys, and duplicates each channel with numbers in the double, triple, and quadruple digits. On cable boxes, this is supposed to separate HD from non-HD channels, but on streaming devices, ...
The simulation results show that the proposed learning algorithm improves the channel utilization even when the number of contending devices is larger than the number of subchannels. In [126], a DRL framework is proposed for the channel selection in the case of a multichannel access system. ...
Millimeter wave spectrum that can deliver gigabit broadband speeds is likely to remain a novelty. The carriers have introduced this in downtown urban neighborhoods to produce a marketing wow factors with TV commercials showing broadband speeds faster than a gigabit. But millimeter wave networks only w...
Here, 𝑁𝛿Nδ and N denote the numbers of idle channels and total channels, respectively. 𝑁𝛿Nδ could be easily derived by measuring the total received power. Notice that 𝑁𝛿Nδ is required only when the SU does not access the channel or it has to refrain from accessing due...
FHSS continuously changes the center frequency of a conventional carrier several times per second according to a pseudo-random set of channels, while chirp spread spectrum changes the carrier frequency. Because a fixed frequency is not used, illegal monitoring of spread spectrum signals is extremely ...
Television stations: 174 to 220 megahertz for channels 7 through 13 What is funny is that every wireless technology you can imagine has its own little band. There are hundreds of them! For example: Garage door openers and alarm systems: Around 40 megahertz Cordless phones: Bands from 43 to ...
First, observe that the TV autocorrelation function is smooth in both system time 𝜏τ (direction of lags) direction and measurement time 𝑡t direction. Second, in the system time direction exponential decaying can be observed. This corresponds to the stricter definition of stability: the impuls...
However, spectrum allocation is even more challenging in TVWS access for the following reasons: (1) mutual interference is increased due to better propagation properties of TVWS channels; (2) coexistence of heterogeneous TVBDs; (3) possible high mobility of TVBDs (e.g., vehicular TVBDs); (...
In short, if we calculate our transmitter fundamentals so that the bulk of the IMD (Intermodulation) product falls into one of these occupied TV channels (where it is insignificant in power, relative to the owner of the channel), then less of the usable space will be occupied by useless ...