Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1988-11-17
1991-04-09
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342352, 364423, H04B 7185
Patent
active
050068555
ABSTRACT:
The satellite system includes at least two satellites having on-board processing capability so that data messages may be exchanged and the position of mobiles may be determined with direct access from multiple ground control facilities. The satellites transmit data and poll individual mobiles upon command by one or more of the control facilities and receive replies from the mobiles including the mobiles' altitude and other data of interest to the control facility. The at least two satellites communicate with one another by means of a cross-link communication path. Computer processing apparatus is included on the satellites to compute the ranges between the mobiles and each of the satellites from the replies received from the mobiles, and to store and process messages. The position information and messages are transmitted to at least one of the control facilities. It is preferred that the control facilities employ TDMA or FDMA protocols in the uplinks to the satellites. The on-board processing makes it readily possible for a number of control facilities to gain access to the satellites directly rather than through a central earth station, and to increase the capacity of a discrete address polling system for a given allocation of radio frequency spectrum. A discrete address polling system is one where each mobile is polled on an individual basis by only responding to polls that contain its identification.
REFERENCES:
patent: 3497807 (1970-02-01), Newton
patent: 3544995 (1970-12-01), Bottenberg
patent: 3879581 (1975-04-01), Schlosser et al.
patent: 4161734 (1979-07-01), Anderson
patent: 4445118 (1984-04-01), Taylor et al.
patent: 4613864 (1986-09-01), Hofgen
patent: 4647932 (1987-03-01), One et al.
"The on Board Computer for the IRAS Satellite"; JA Van Stuyvenberg; Journal; of the Interplanetary Society; vol. 32, No. 2, pp. 43-47, 1979.
Swann Tod R.
Tarcza Thomas H.
The Mitre Corporation
LandOfFree
Ranging and processing system for mobile surveillance and data l does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ranging and processing system for mobile surveillance and data l, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ranging and processing system for mobile surveillance and data l will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2037675