Detail publikace

SDR Implementation for DCF77

ZÁPLATA, F. KASAL, M.

Originální název

SDR Implementation for DCF77

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

The DCF77 signal is used to carry out the information of precise time for long distances. Standard DCF77 receivers consist of AM long wave receiver circuit, connected to a data processing unit. Whole AM receiver circuit is often integrated into a chip with some external components. Such circuit gives demodulated logical data output, which can be led right to the processor to be decoded and presented. The idea is to remove the analog demodulator and process the amplified RF signal also on the processor. Specialized AM radio chip then would be replaced by a simple amplifier, e.g. operational amplifier circuit. Nowadays, microcontrollers include AD converters fast enough to digitalize signals at frequencies above 77.5 kHz. Using the advantages of undersampling, Goertzel algorithm and correlation techniques, it allows to make program very low computational power demanding. Developed algorithm is supposed to be implemented to 70 MHz ARM7 LPC2103 microcontroller. Examples of code realization in GCC are introduced also with discussion of possible complications.

Klíčová slova

DCF77; time stamp transmission; software defined radio; digital receiver; Goertzel algorithm; mathecd filter;

Autoři

ZÁPLATA, F.; KASAL, M.

Rok RIV

2013

Vydáno

17. 4. 2013

ISBN

978-1-4673-5517-9

Kniha

Proceedings of Microwave and Radio Electronics Week 2013

Strany od

340

Strany do

345

Strany počet

6

BibTex

@inproceedings{BUT99210,
  author="Filip {Záplata} and Miroslav {Kasal}",
  title="SDR Implementation for DCF77",
  booktitle="Proceedings of Microwave and Radio Electronics Week 2013",
  year="2013",
  pages="340--345",
  isbn="978-1-4673-5517-9"
}