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Although active selection is more precise because it depends on instantaneous CSI during the communication, it would cost additional spectrum during transmission to select best relay.
Motivated by this fact, in PRS scheme, the node S uses the CSI solely of the channels pertaining to first-hop transmission to select the aiding relay R p that has the best link from S, i.e., begin{array}{*{20}l} k^{ast}_{mathsf{PRS}} = arg maxlimits_{k=1,ldots,K}left(|h_{mathsf{S} mathsf{R}_{k}}|^{2}right). end{array} (10).
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Users of the service need only drag their photos to an icon on the computer's desktop for instant transmission to selected friends.
The objective of opportunistic transmission was to select the best combination which could minimize the consuming of time slots while satisfying the packet loss rate guarantee.
Paper [10] discusses the use of transmission power control to select reliable links and disable unreliable links via a blacklisting method in order to improve the system performance.
Instead you shift up or down using controls on the steering wheel, while the four-mode transmission allows you to select just how aggressively you want it to behave.
In this section, we derive the transmission mode switching strategy to select the best transmission mode for the D2D communication system.
At this stage data transmission to the selected users begins.
ETX [16] is based on the expected number of transmissions (including retransmissions) to select the next hop, and the aim is to minimize the end-to-end number of transmissions, thus saving bandwidth.
To enhance the secondary transmission, it is feasible to select the antenna with the maximum transmission channel gain between ST and SR [18], which is denoted as transmission channel gain maximum (TRAM -based meTRAM -based
For the data transmission, individual players try to select a vacant PU channel.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com