Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1998-06-05
2000-03-14
Eisenzopf, Reinhard J.
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455 676, H04B 7185, H04B 1700
Patent
active
060384271
ABSTRACT:
The method and apparatus for determining group delay of a satellite communications channel includes a low frequency vector network analyzer and microwave swept synthesizer which together generate modulated signals. A sample of the signals transmitted to a satellite and the signals retransmitted from the satellite are compared in the network analyzer to obtain the phase of the signals. The phase of a reference signal is measured prior to and after each test frequency of the communications channel. A quasi-real time phase reference can be obtained by interpolation. Thus, the reference phase due to movement of the satellite with respect to the earth station during group delay measurement may be removed.
REFERENCES:
patent: 4956864 (1990-09-01), Brockman
patent: 5125100 (1992-06-01), Katznelson
patent: 5787384 (1998-07-01), Johnson
patent: 5805108 (1998-09-01), Lennen
patent: 5818517 (1998-10-01), Hudson et al.
patent: 5949372 (1999-09-01), Lennen
Bettger David D.
Hsu Rui T.
Iwatake Walter T.
Appiah Charles N.
Eisenzopf Reinhard J.
Grunebach Georgann S.
Gudmestad Terje
Hughes Electronics Corporation
LandOfFree
Method and apparatus for measuring group delay for satellite com does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring group delay for satellite com, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring group delay for satellite com will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-178116