Book chapter
Cognitive Radio
Fading and Shadowing in Wireless Systems, pp 713-805
06 May 2017
Abstract
Spectral band available for use in wireless communications is a limited commodity regardless of whether it is used by the traditional wireless subscribers or by digital television. It is also known that these limited resources often remain underutilized raising the possibility that the unused channels may be utilized during the downtime of the authorized users. This opportunistic access to the wireless spectrum (of licensed bands) by unlicensed users when the licensed users are not online constitutes the concept of the cognitive radio. The performance of cognitive radio has been described in this chapter. Quantitative measures such as the performance index, area under the ROC curve (AUC), and partial AUC index have been used to compare the performance of energy detectors commonly used in cognitive radio. The adverse effects of fading and shadowing have been examined along with improvements obtained through diversity. Along with analytical and numerical methods for evaluating the performance, steps to simulate the cognitive radio in ideal and faded channels have been provided along with complete description of Matlab scripts for analytical evaluation and Monte Carlo simulation using random numbers.
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Details
- Title
- Cognitive Radio
- Creators
- P. Mohana Shankar - Drexel University
- Publication Details
- Fading and Shadowing in Wireless Systems, pp 713-805
- Publisher
- Springer International Publishing; Cham
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Other Identifier
- 991019187081004721