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Kliwati , Sri
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Aerospace Engineering Astronomy

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Journal : Indonesian Journal of Aerospace

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ALGORITMA DETEKSI FREKUENSI DTMF MENGGUNAKAN KORELASI SILANG UNTUK TELEKOMANDO WAHANA TERBANG (DTMF FREQUENCY DETECTION ALGORITHM USING CROSSCORRELATION FOR VEHICLE TELECOMMAND) Kliwati , Sri
Indonesian Journal of Aerospace Vol. 14 No. 1 Juni (2016): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2016.v14.a2942

Abstract

In general, the frequency DTMF detection algorithm using FFT (Fast Fourier Transform) and Goertzel Algorithm. However, in certain circumstances a more suitable signal detected by the other algorithms. For example in a non-periodic signal as the measurement sensors for flight vehicle. The purpose of this study is to develop a system telecommand for flight vehicle. And this paper discusses the frequency DTMF (Dual Tone Multi Frequency) detection method using cross correlation algorithm and data-base DTMF. The simulation results show the frequency detection successfully carried out in accordance with the accuracy of the data-base created (1 Hz) to change the frequency of zero to 1700 Hz (DTMF frequency limit).
PENINGKATAN REOLUSI PERHITUNGAN FREKUENSI GELOMBANG SINUS MENGGUNAKAN FFT (IMPROVING CALCULATION RESOLUTION OF SINE WAVE FREQUENCY USING FFT) Kliwati , Sri
Indonesian Journal of Aerospace Vol. 13 No. 1 Juni (2015): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perhitungan perubahan frekuensi sinyal sinus sangat penting untuk aplikasipada intrumentasi. Seperti pada sistem Doppler yang juga memerlukan perhitunganfrekuensi keluaran berupa gelombang sinus. Tulisan ini membahas peningkatanresolusi perhitungan perubahan frekuensi gelombang sinus berbasis algoritma FastFourier Transform (FFT). Penambahan waktu sampling data dapat meningkatkanresolusi frekuensi dengan signifikan, tetapi sampling data menjadi lebih rendah. Padaaplikasi frekuensi Doppler 440 MHz resolusi kecepatan sekitar 6.8 m/detik dengansampling data 10 Hz. Resolusi dan sampling data ini harus disesuaikan dengankecepatan dan durasi terbang roket agar optimal dalam pengukurannya
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