Quadrature Detection Methods for FM Demodulation
Sona Sunny, Jaison Varghese John, T.J. Apen · 2013
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.