Title :
Quadrature Detection Methods for FM Demodulation
Author :
Sunny, Sherin ; John, Jaison Varghese ; Apen, T.J.
Author_Institution :
Dept. of Electron. & Commun. Eng, Amal Jyothi Coll. of Eng., Kottayam, India
Abstract :
The Telecommand system enables the control of launch vehicle during the flight. Command system uses a FM/FSK modulation on a UHF-Band link. In this paper, different quadrature detection methods for FM demodulation like arc tan method, CORDIC vector rotation method etc. are studied and simulated in MATLAB. The Algorithms are then compared based on SNR, frequency spectrum and complexity so as to find out the best algorithm for a telecommand receiver in a spacecraft. Same algorithm is implemented in VHDL also.
Keywords :
demodulation; frequency modulation; mean square error methods; space communication links; space vehicles; CORDIC vector rotation method; FM demodulation; FM modulation; FSK modulation; MATLAB; SNR; UHF-band link; arc tan method; frequency spectrum; launch vehicle; quadrature detection methods; spacecraft; telecommand receiver; telecommand system; Baseband; Demodulation; Frequency shift keying; Receivers; Signal to noise ratio; Space vehicles; ARCTAN; CORDIC; FM demodulation; MATLAB; SNR; telecomand receiver;
Conference_Titel :
Advances in Computing and Communications (ICACC), 2013 Third International Conference on
Conference_Location :
Cochin
DOI :
10.1109/ICACC.2013.92
