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Erschienen in:
Multiple Antenna Spectrum Sensing in Colored Noise Kapitel lesen Erstes Kapitel lesen

2019 | OriginalPaper | Buchkapitel

9. Sequential Methods for Spectrum Sensing

verfasst von : Yan Xin, Lifeng Lai

Erschienen in: Handbook of Cognitive Radio

Verlag: Springer Singapore

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Abstract

Spectrum sensing is widely regarded as a key enabling technology to support dynamic spectrum access (DSA) for cognitive radio (CR). Though in principle spectrum sensing can be viewed as a traditional signal detection problem, the design of spectrum sensing algorithms needs to take into account certain stringent requirements due to the nature of CR systems. Firstly, it is important for spectrum sensing algorithms to be robust to signal models as it is often difficult in practice for secondary users (SUs) to acquire complete or even partial knowledge about primary signals. Secondly, a small detection delay is essential for the spectrum sensing even under a fairly low detection signal-to-noise ratio (SNR) level with low detection error probabilities. This chapter focuses on a particular type of spectrum sensing algorithms, called sequential spectrum sensing algorithms for CR systems. Compared with block-based sensing algorithms, sequential sensing algorithms enable us to make detection decision with minimum delay while still providing certain performance guarantee. We will first illustrate the benefits of sequential detection for a single-band system. We will then discuss how to design quickest sequential scanning algorithms for multiband systems to quickly identify free channels.

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Vorheriges Kapitel Spectrum Sensing, Database, and Its Hybrid
Nächstes Kapitel Cooperative Spectrum Sensing: From Fundamental Limits to Practical Designs
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Metadaten
Titel
Sequential Methods for Spectrum Sensing
verfasst von
Yan Xin
Lifeng Lai
Copyright-Jahr
2019
Verlag
Springer Singapore
Buch
Handbook of Cognitive Radio

Print ISBN: 978-981-10-1393-5

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

Copyright-Jahr: 2019

DOI
https://doi.org/10.1007/978-981-10-1394-2_9

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