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2019 | OriginalPaper | Chapter

5. Spectrum Sensing, Measurement, and Modeling

Authors : Ghaith Hattab, Danijela Cabric

Published in: Handbook of Cognitive Radio

Publisher: Springer Singapore

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Abstract

Modeling spectrum sensing is a critical step that paves the way to (i) identify the key impairments that affect the detection performance and (ii) help develop algorithms and receiver architectures that mitigate these impairments. In this chapter, realistic and practical sensing models are presented beyond those developed for classical detection theory. These models capture the impact of different sensing receiver impairments on several detectors such as the energy, the pilot, and the cyclostationarity detectors. Several receiver nonidealities are investigated, including noise uncertainty, imperfect synchronization, and cyclic frequency offsets. In addition, challenges and impairments pertaining to wideband sensing are analyzed, including the presence of strong adjacent interferers as well as the nonlinearities of the receiver RF front-end. From these models, several mitigation techniques are developed to compensate for the presence of the different sensing receiver impairments. Measurements and simulation results are presented throughout the chapter to show the negative impact of such impairments and validate that the developed mitigation techniques provide tangible performance gains.

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previous chapter Modeling and Performance Analysis of Cognitive Radio Systems from a Deployment Perspective

next chapter Spectrum Sensing Methods and Their Performance

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Title: Spectrum Sensing, Measurement, and Modeling
Authors: Ghaith Hattab
Danijela Cabric
Publisher: Springer Singapore
Book: Handbook of Cognitive Radio
Print ISBN: 978-981-10-1393-5

Electronic ISBN: 978-981-10-1394-2

Copyright Year: 2019
DOI: https://doi.org/10.1007/978-981-10-1394-2_5

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