DocumentCode :
2729638
Title :
Processing of SARSAT signals using modified digital Lerner filter
Author :
Dessouky, Moawad Ibrahiem Moawad
Author_Institution :
Fac. of Electron. Eng., Menoufia Univ., Egypt
fYear :
1998
fDate :
24-26 Feb 1998
Abstract :
Search and rescue satellite aided tracking (SARSAT) is a method of employing satellites in low polar orbits to relay the emergency signals from distressed platforms to an Earth station where signal processing techniques are used to measure the Doppler frequency shift. This paper deals with transmitting an emergency locator transmitter (ELT) signal through a second order bandpass Lerner filter and then estimating the power spectral density of the output signal using the periodogram and averaged periodogram techniques. The Lerner filter possesses a flat response across the passband and a steep skirt response at the band edges, which improves the detection of the carrier component peak at the ELT signal
Keywords :
Doppler shift; band-pass filters; digital filters; radio direction-finding; radio tracking; satellite communication; spectral analysis; Doppler frequency shift; SARSAT signals; emergency locator transmitter; emergency signals; low polar orbits; modified digital Lerner filter; periodogram; power spectral density; search and rescue satellite aided tracking; second order bandpass Lerner filter; signal processing techniques; Band pass filters; Digital filters; Digital relays; Extraterrestrial measurements; Frequency measurement; Low earth orbit satellites; Passband; Satellite ground stations; Signal processing; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radio Science Conference, 1998. NRSC '98. Proceedings of the Fifteenth National
Conference_Location :
Cairo
Print_ISBN :
0-7803-5121-5
Type :
conf
DOI :
10.1109/NRSC.1998.711481
Filename :
711481
Link To Document :
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