Title :
Carrier false lock performance for TDRS TT&C transponder
Author :
Tsang, Chit-Sang
Author_Institution :
Dept. of Electr. Eng., California State Univ., Long Beach, CA, USA
Abstract :
In this paper the mechanism of carrier false lock phenomenon of a design of TDRS TT&C transponder is analyzed in details. It is found that the carrier false lock is due to the excessive time delays in the filters and other electronic components in the long tracking loop. The stability of the AGC and the command lock out issues of the same transponder are also addressed. Suggestions on the fixes are also provided
Keywords :
automatic gain control; data communication systems; digital simulation; satellite relay systems; synchronisation; telecommunications computing; telemetering; tracking; transponders; AGC; TDRS TT&C transponder; carrier false lock performance; carrier synchronisation; command lock; filters; stability; time delays; tracking loop; Baseband; Delay effects; Design automation; Detectors; Filters; Frequency synchronization; Sampling methods; Satellite ground stations; Stability; Transponders;
Conference_Titel :
Aerospace Applications Conference, 1994. Proceedings., 1994 IEEE
Conference_Location :
Vail, CO
Print_ISBN :
0-7803-1831-5
DOI :
10.1109/AERO.1994.291184
