Sensoriamento de Espectro de Sistemas TETRA por meio de análise tempo-frequência (Spectrum Sensing of TETRA Systems through Time-Frequency Analysis)

Wilson Diniz Wellisch (wilped@gmail.com)1, Andre Noll Barreto (andrebarreto@ene.unb.br)2


1Agência Nacional de Telecomunicações
2Universidade de Brasília

This paper appears in: Revista IEEE América Latina

Publication Date: May 2013
Volume: 11,   Issue: 3 
ISSN: 1548-0992


Abstract:
In a cognitive radio system where the primary user is a TDMA based system, spectrum sensing must be able to identify the occupation of both a frequency band and a time slot. Whereas this can be done by scanning each narrowband frequency channel in turns, we can also perform a wideband sampling of the transmitted signal, and identify simultaneously the occupied frequency bands and time slots by means of a time-frequency analysis. In this paper we propose the use of this approach, using a spectrogram, in order to sense the spectrum and determine the occupied channels of a TETRA system.

Index Terms:
spectrum sensing, time-frequency analysis   


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