This study proposes a mobile middleware for cognitive radio (CR) for improving the wireless communication link.
Conclusions are drawn in Section 4. The complete wireless communication link defined in this paper consists of modulation and demodulation modules, transmitting antenna, receiving antenna, and radio propagation environment, as shown in Figure 1. Figure 1 Schematic diagram of the wireless communication link.
Air forces employed wire and radio communication to link up their bases and landing fields and had developed airborne long-range, medium-range, and short-range radio equipment for air-to-ground and air-to-air communication.
These will record the creatures' locations in real time, using radio-frequency communication linked to instruments onboard the International Space Station. Butas well as monitoring migrations, ICARUS will also be used to look for unusual movements of animals.
High-frequency radio opened up communication links to remote communities, except when the ionosphere was disrupted by space weather disturbances.
In LTE, UEs perform the RA procedure for several reasons such as for establishing a communication link, re-initiating a radio link after a failure, for radio resources in case of no uplink resource grant, and scheduling requests in the absence of dedicated physical uplink control channels (PUCCHs).
STs can communicate with each other in real time and the communication link between them can be formed by using a radio, infrared or an optical media depending upon the availability [2].
If there is no direct radio communication between the GB and the nodes, then satellite link acts as an alternative way of communication.
In optical communication link, generation and delivering millimeter-wave (mm-waves) in radio over fiber (RoF) systems has limitation due to fiber non-linearity effects.
For smart objects, which often use wireless radio communication, radio jamming is a threat to communication availability, which can be handled at the radio link layer and at higher layers.
