Spectrum Sensing Techniques: An Overview

Spectrum Sensing Techniques: An Overview

Rajib Biswas
Copyright: © 2019 |Pages: 8
DOI: 10.4018/978-1-5225-5354-0.ch007
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Cognitive radio has come a long way in the recent years with the advent of improved algorithms and instrumentation. However, for ease and efficient working of cognitive radio, there is a need to have effective detection of spectrum sensing. The objective of spectrum sensing techniques is to find spectrum holes which can be accessible by the users of cognitive radio. The deployment of suitable sensing techniques reduces undesirable congestion in traffic and enhancement of spectrum usage. All these require sensing techniques whose main goal is oriented towards efficient identification and subsequent deployment of spectrum. This chapter is aimed to give a brief overview of some spectrum sensing techniques. An attempt is made to give the characteristics of the highly deployable sensing schemes. Accordingly, the merits and demerits are comprehensively highlighted. Further, emphasis has been given to relevant future challenges.
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Spectrum Sensing Methods

There are several ways of sensing spectrum. Chiefly, it is categorized into two-namely co-operative and non-co-operative. However, there arises another classification known as Interference based sensing. It is depicted in Figure 1. Again, the co-operative sensing is split into three ways, viz., matched filtering, energy detection and cyclostationary detection. In the following section, the sensing techniques are elaborated.

Figure 1.

General Classification of Spectrum Sensing Techniques


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