O'Reilly logo

Spectrum Sensing Techniques and Applications by Professor Carlos Miranda Regis, Professor Waslon Terllizzie Araújo Lopes, Professor Fabricio Soare de Carvalho, Professor Marcelo Sampaio de Alencar

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CHAPTER 2

SPECTRUM SENSING AND DETECTION

2.1 INTRODUCTION

The cognitive radio allows users to analyze the frequency spectrum and look for opportunities in bands that are temporarily available. The spectral sensing is a procedure to determine the frequency bands that can be used opportunistically by secondary users (Haykin et al. 2009).

The spectral detection verifies if the available frequency bands are momentarily idle or busy. Thus, the spectral sensing evaluates if there are primary or secondary users transmitting in the licensed bands. If there are no primary users occupying the available channels, spectrum holes can be identified. Spectrum holes correspond to electromagnetic bands that are not being used and, in this way, can be allocated ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required