Analysis and Design of Cognitive Radio Networks Using Game Theory
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Analysis and Design of Cognitive Radio Networks Using Game Theory |
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Cognitive Radio functionalities
In his dissertation [Mitola_00], Joseph Mitola considers the nine levels of increasing cognitive radio functionality shown in Table 1.2, ranging from a software radio to a complex self-aware radio.
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As a reference for how a cognitive radio could achieve these levels of functionality, [Mitola_00] introduces the cognition cycle, shown in Figure 1.1, as a “top-level control loop for cognitive radio.” In the cognition cycle, a radio receives information about its operating environment (Outside world) through direct observation or through signaling. This information is then evaluated (Orient) to determine its importance. Based on this valuation, the radio determines its alternatives (Plan) and chooses an alternative (Decide) in a way that presumably would improve the valuation. Assuming a waveform change was deemed necessary, the radio then implements the alternative (Act) by adjusting its resources and performing the appropriate signaling. These changes are then reflected in the interference profile presented by the cognitive radio in the Outside world. As part of this process, the radio uses these observations and decisions to improve the operation of the radio (Learn), perhaps by creating new modeling states, generating new alternatives, or creating new valuations.
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figure 1-1 : Cognition Cycle |
Institutional Initiatives
several entities have started publicly acknowledged
initiatives into cognitive radio including DARPA, the SDR Forum, IEEE, and the FCC.
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