TELKOMNIKA Telecommunication, Computing, Electronics and Control
Sensing and analysis of spectrum holes in ISM band using USRP testbed

TELKOMNIKA Telecommunication, Computing, Electronics and Control
Sensing and analysis of spectrum holes in ISM band using USRP testbed

Cognitive radio
Energy detection
LabVIEW
Spectrum holes
USRP

The spectrum frequency in the wireless communication industry is getting
great attention due to the internet of things (IoT) technology's growth.
However, the radio spectrum's frequency band use is limited because the
primary user for specific services can cause spectrum interference as multiple
users use the same spectrum frequency. Meanwhile, at each spectrum
frequency, the number of users and utilization time are distinct. These will
create vacancies for spectrum frequency assigned to the primary user. A new
alternative in using the cognitive radio (CR) spectrum is accessible to these
vacancies. This paper analyzed the frequency spectrum in the industrial,
scientific and medical (ISM) band and identified spectrum holes for
transmission by the secondary users. This work employed a realistic approach
by measuring the spectrum using Universal Software Radio Peripheral (USRP)
devices. Thus, the spectrum holes in the frequency spectrum had distinguished
by using an energy detection technique. In the energy detection technique, the
threshold energy level is set and then compared with the energy detector output
to identify the primary user's existence (PU). The result indicates that 0.61%
of spectrum holes have been detected in the 2.43-2.44 GHz range. This range
is sufficient for home appliances, radio frequency peripherals (RF), and
bluetooth devices.

Nur Syahirah Hamdan, Mas Haslinda Mohamad, Aduwati Sali

May 9, 2021

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