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Topology Control, Scheduling, And Spectrum Sensing In 5g Networks, Prosanta Paul
Topology Control, Scheduling, And Spectrum Sensing In 5g Networks, Prosanta Paul
Electrical & Computer Engineering Theses & Dissertations
The proliferation of intelligent wireless devices is remarkable. To address phenomenal traffic growth, a key objective of next-generation wireless networks such as 5G is to provide significantly larger bandwidth. To this end, the millimeter wave (mmWave) band (20 GHz -300 GHz) has been identified as a promising candidate for 5G and WiFi networks to support user data rates of multi-gigabits per second. However, path loss at mmWave is significantly higher than today's cellular bands. Fortunately, this higher path loss can be compensated through the antenna beamforming technique-a transmitter focuses a signal towards a specific direction to achieve high signal gain …
Performance Of Cognitive Radio Networks With Unknown Dynamic Primary User Signals, Sara L. Macdonald
Performance Of Cognitive Radio Networks With Unknown Dynamic Primary User Signals, Sara L. Macdonald
Electrical & Computer Engineering Theses & Dissertations
The current static assignment of RF spectrum in the United States and other parts of the world has led to a large portion of the RF spectrum to be geographically and temporally underutilized. While the amount of RF spectrum is finite, the demand for spectrum continues to increase making it necessary to increase utilization of many bands. Several innovative methods for allowing licensed primary users (PUs) to share spectrum with unlicensed secondary users (SUs) have being proposed. Of these methods Cognitive Radio (CR) has emerged as a promising technology that enables SUs to dynamically access spectrum after first sensing the …
Smart Sensing And Performance Analysis For Cognitive Radio Networks, Yanxiao Zhao
Smart Sensing And Performance Analysis For Cognitive Radio Networks, Yanxiao Zhao
Electrical & Computer Engineering Theses & Dissertations
Static spectrum access policy has resulted in spectrum scarcity as well as low spectrum utility in today's wireless communications. To utilize the limited spectrum more efficiently, cognitive radio networks have been considered a promising paradigm for future network. Due to the unique features of cognitive radio technology, cognitive radio networks not only raise new challenges, but also bring several fundamental problems back to the focus of researchers. So far, a number of problems in cognitive radio networks have remained unsolved over the past decade. The work presented in this dissertation attempts to fill some of the gaps in the research …
Enhancing Spectrum Utilization In Dynamic Cognitive Radio Systems, Dusadee Treeumnuk
Enhancing Spectrum Utilization In Dynamic Cognitive Radio Systems, Dusadee Treeumnuk
Electrical & Computer Engineering Theses & Dissertations
Cognitive radio (CR) is regarded as a viable solution to enabling flexible use of the frequency spectrum in future generations of wireless systems by allowing unlicensed secondary users (SU) to access licensed spectrum under the specific condition that no harmful interference be caused to the licensed primary users (PU) of the spectrum. In practical scenarios, the knowledge of PU activity is unknown to CRs and radio environments are mostly imperfect due to various issues such as noise uncertainty and multipath fadings. Therefore, important functionalities of CR systems are to efficiently detect availability of radio spectrum as well as to avoid …