Title :
Frequency Tracking a Downlink FH Signal for Mobile Platforms
Author_Institution :
Stanford Telecommunications, Inc., 6888 Elm Street, McLean, Virginia 22101
fDate :
Oct. 31 1983-Nov. 2 1983
Abstract :
A mobile platform receiving a frequency hopped (FH) downlink must acquire and track that link to sustain communications. A technique originated by Ziv and Zakai allows us to lower bound the achievable frequency error for a variety of channel conditions (Gaussian, partial-band, Raleigh). In closed loop space-to-ground tracking systems which have an FH uplink as well, frequency precorrection may be needed on each of the terminal´s transmissions. The frequency error model developed in this paper is used in combination with models of other frequency error sources to yield analysis that can aid in selecting tracking update rates.
Keywords :
Downlink; Error correction; Fading; Frequency estimation; Frequency measurement; Mobile communication; Robustness; Satellites; Space vehicles; Tracking loops;
Conference_Titel :
Military Communications Conference, 1983. MILCOM 1983. IEEE
Conference_Location :
Washington, DC, USA
DOI :
10.1109/MILCOM.1983.4794750
