Two methods of spectral estimation for SARSAT signals
Abstract
Search and rescue satellite aided tracking (SARSAT) depends on the processing of emergency locator transmitter (ELT) signals which are received by a satellite in low polar orbit. Since the signal from a distressed vehicle is normally immersed in a background of other ELT signals (false alarms), interference, and noise, different methods of spectral estimation can provide advantages in estimating carrier frequency. A comparison between average spectrum and minimum spectrum for several real signals is provided here.
- Publication:
-
IEEE Transactions on Aerospace Electronic Systems
- Pub Date:
- July 1985
- DOI:
- 10.1109/TAES.1985.310644
- Bibcode:
- 1985ITAES..21..559C
- Keywords:
-
- Cospas;
- Emergency Locator Transmitters;
- Polar Orbits;
- Power Spectra;
- Sarsat;
- Signal Processing;
- Block Diagrams;
- Crystal Oscillators;
- Doppler Effect;
- Frequency Modulation;
- Power Amplifiers;
- White Noise;
- Space Communications, Spacecraft Communications, Command and Tracking