Patents by Inventor Peter H. Cress
Peter H. Cress has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20040211864Abstract: Satellite communication systems are provided that employ highly inclined, highly elliptical orbits. The satellite communication systems have a satellite constellation phased to provide a ground trace with respect to the earth that is repeated by each of the satellites in the constellation such that the satellites appear to follow one another over similar paths over the earth. Due to the path of the ground trace provided, ground stations can employ a single axis tracking device since the satellites appear to move along similar overlapping paths in opposing directions relative to a user on the ground during communication control handoffs.Type: ApplicationFiled: April 25, 2003Publication date: October 28, 2004Inventors: Gregory P. Less, James K. Gruver, Scott L. Keller, Oliver W. Saunders, Stuart T. Linsky, Michael Fashano, Peter H. Cress
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Patent number: 5971324Abstract: A multiple altitude satellite relay system is disclosed in which Medium Earth Orbit satellites are continuously linked with at least one geosynchronous satellite to provide uninterrupted relaying of messages and data. The Medium Earth Orbit satellites are synchronized with the geosynchronous satellites to produce continuous links. A parameter to achieve the synchronization involves the positions of the Medium Earth Orbit satellite relays relative to the positions of the geosynchronous satellite relays. Another parameter to achieve synchronization involves the ratio between the orbital periods of the geosynchronous satellite relays relative to the orbital periods of the Medium Earth Orbit satellite relays. These parameters may be further adjusted to provide continuous links above the horizon of the earth.Type: GrantFiled: November 27, 1996Date of Patent: October 26, 1999Assignee: TRW Inc.Inventors: Brian R. Williams, Peter H. Cress
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Patent number: 5906337Abstract: A multiple altitude satellite relay system is disclosed in which Medium Earth Orbit satellites are continuously linked with at least one Geosynchronous satellite to provide uninterrupted relaying of messages and data. The Medium Earth Orbit satellites are synchronized with the Geosynchronous satellites to produce continuous links. A parameter to achieve the synchronization involves the positions of the Medium Earth Orbit satellite relays relative to the positions of the Geosynchronous satellite relays. Another parameter to achieve synchronization involves the ratio between the orbital periods of the Geosynchronous satellite relays relative to the orbital periods of the Medium Earth Orbit satellite relays. These parameters may be further adjusted to provide continuous links above the horizon of the earth.Type: GrantFiled: October 3, 1995Date of Patent: May 25, 1999Assignee: TRW Inc.Inventors: Brian R. Williams, Peter H. Cress
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Patent number: 5867783Abstract: A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for worldwide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellites handovers, and the total number of satellites.Type: GrantFiled: August 30, 1996Date of Patent: February 2, 1999Assignee: TRW Inc.Inventors: Michael Horstein, Peter H. Cress, Roger J. Rusch
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Patent number: 5551624Abstract: A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for worldwide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellites handovers, and the total number of satellites.Type: GrantFiled: May 12, 1995Date of Patent: September 3, 1996Assignee: TRW Inc.Inventors: Michael Horstein, Peter H. Cress, Roger J. Rusch
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Patent number: 5439190Abstract: A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for worldwide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellites handovers, and the total number of satellites.Type: GrantFiled: October 12, 1993Date of Patent: August 8, 1995Assignee: TRW Inc.Inventors: Michael Horstein, Peter H. Cress, Roger J. Rusch
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Patent number: 5433726Abstract: A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for worldwide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellite handovers, and the total number of satellites.Type: GrantFiled: May 28, 1992Date of Patent: July 18, 1995Assignee: TRW Inc.Inventors: Michael Horstein, Peter H. Cress, Roger J. Rusch
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Patent number: 5415368Abstract: A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for worldwide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellites handovers, and the total number of satellites.Type: GrantFiled: October 12, 1993Date of Patent: May 16, 1995Assignee: TRW Inc.Inventors: Michael Horstein, Peter H. Cress, Roger J. Rusch
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Patent number: 5415367Abstract: A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for world-wide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellite handovers, and the total number of satellites.Type: GrantFiled: May 28, 1992Date of Patent: May 16, 1995Assignee: TRW Inc.Inventors: Michael Horstein, Peter H. Cress, Roger J. Rusch