Sentence examples for secondary communication system from inspiring English sources
In [11], the multi-objective resource allocation problem is studied for multi-user multiple-input single-output (MISO) secondary communication system with SWIPT.
The model considered in the paper can be viewed as a secondary multiaccess communication system with some cognitive and noncognitive users introduced into the existing primary communication system.
In this paper, we are interested in studying the achievable rates of the secondary multiaccess communication system with some cognitive users.
Until this point it is pretty clear that this proposal considers both the time-varying nature of channel and the frequency selectivity, for introducing a secondary communication into SC-FDMA system.
Spectrum interweave is the original idea of utilizing the spectrum holes left by primary system to establish secondary communication links.
However, this cooperative scheme needs a centralized controller to manage all secondary users, which is some unreasonable for a practical wireless communication system.
Because of growing demand for bandwidth in wireless systems, some secondary users with cognitive capabilities are introduced into an existing primary communication system to use the frequency spectrum more efficiently [8].
In order to improve the frequency spectrum efficiency in wireless systems, some secondary users which are capable of acquiring some knowledge about the primary communication are introduced into an existing primary communication system [26].
In future 5G communication system, radio resources can be effectively reused by cognitive radio networks (CRNs), where a lot of secondary users (SUs) are able to access the spectrum of primary users (PUs).
This microbial communication system regulates e.g. symbiosis, biofilm formation, conjugation, sporulation, virulence, motility and the production of various secondary metabolites (Raina et al., 2009; Maroti et al., 2011).
The emergency communication system was inoperable.
