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Full-Text Articles in Computer Engineering
Performance Optimization Over Wireless Links With Operating Constraints, Shiny Abraham
Performance Optimization Over Wireless Links With Operating Constraints, Shiny Abraham
Electrical & Computer Engineering Theses & Dissertations
Wireless communication is one of the most active areas of technological innovations and groundbreaking research ranging from simple cellular phones to highly complex military monitoring devices. The emergence of radios with cognitive capabilities like software defined radios has revolutionized modern communication systems by providing transceivers which can vary their output waveforms as well as their demodulation methods. This adaptability plays a pivotal role in efficient utilization of radio spectrum in an intelligent way while simultaneously not interfering with other radio devices operating on the same frequency band. Thus, it is safe to say that current and future wireless systems and …
Spectrum Adaptation In Cognitive Radio Systems With Operating Constraints, Deepak R. Joshi
Spectrum Adaptation In Cognitive Radio Systems With Operating Constraints, Deepak R. Joshi
Electrical & Computer Engineering Theses & Dissertations
The explosion of high-data-rate-demanding wireless applications such as smart-phones and wireless Internet access devices, together with growth of existing wireless services, are creating a shortage of the scarce Radio Frequency (RF) spectrum. However, several spectrum measurement campaigns revealed that current spectrum usage across time and frequency is inefficient, creating the artificial shortage of the spectrum because of the traditional exclusive "command-and-control" model of using the spectrum. Therefore, a new concept of Cognitive Radio (CR) has been emerging recently in which unlicensed users temporarily borrow spectrum from the licensed Primary Users (PU) based on the Dynamic Spectrum Access (DSA) technique that …