John S Hanson

US Patent:

6396819, May 28, 2002

Filed:

Mar 21, 1998

Appl. No.:

09/045970

Inventors:

Richard D. Fleeter - Reston VA 20194
John Eric Hanson - Mountain View CA 94043
Scott A. McDermott - Manassas VA 20109-6450

International Classification:

H04B 7216

US Classification:

370320, 370342

Abstract:

The satellite communication system has a ground station and multiple remote terminal units (RTUs). The RTUs are designed to infrequently transmit relatively short duration messages, and to repeatedly transmit the same message, so that it is received by a sweeping high gain satellite antenna. To minimize costs, the system is designed to allow the use of RTUs that use a fixed modulation scheme. Because the transmissions are infrequent and short, the loss of messages due to collisions is unlikely. As a further optimization, the RTUs have CDMA transmitters that each use the same CDMA code, and the ground station has multiple CDMA correlators using the same CDMA code. By using the same CDMA code, the loss of messages due to collisions is further reduced. For transmitting to the RTUs, the ground station has multiple CDMA modulators, each using a second CDMA code that is preferrably orthogonal to the first CDMA code.

US Patent:

6856606, Feb 15, 2005

Filed:

Jan 22, 2002

Appl. No.:

10/054175

Inventors:

Richard D. Fleeter - Reston VA, US
John E. Hanson - Mountain View CA, US
Scott A. McDermott - Washington DC, US

Assignee:

AeroAstro, Inc. - Ashburn VA

International Classification:

H04B007/185

US Classification:

370316

Abstract:

A communication system is provided that allows the use of low-cost, low-power remote terminal units that communicate substantially asynchronously and independently to a base station. To minimize cost and complexity, the remote terminal units are configured similarly, including the use of substantially identical transmission schemes, such as a common Direct Sequence Spread Spectrum (DSSS) code. To minimize collisions among transmissions, the communication system is designed to use a high-gain antenna with a limited field of view, to limit the number of cotemporaneous, or overlapping transmissions that are received at the base station. To cover a wide area, the limited field of view is swept across the area of coverage. To overcome potential losses caused by collisions, the remote terminal units are configured to repeat transmissions; to minimize repeated collisions, the repeat interval and/or duration is randomized.

US Patent:

8494443, Jul 23, 2013

Filed:

Nov 18, 2004

Appl. No.:

10/992173

Inventors:

Richard D. Fleeter - Reston VA, US
John E. Hanson - Mountain View CA, US
Scott A. McDermott - Washington DC, US

Assignee:

Comtech Mobile Datacom Corporation - Germantown MD

International Classification:

H04B 7/185

US Classification:

455 121, 455 98, 455427, 455430, 455431

Abstract:

A communication system is provided that allows the use of low-cost, low-power remote terminal units that communicate substantially asynchronously and independently to a base station. To minimize cost and complexity, the remote terminal units are configured similarly, including the use of substantially identical transmission schemes, such as a common Direct Sequence Spread Spectrum (DSSS) code. To minimize collisions among transmissions, the communication system is designed to use a high-gain antenna with a limited field of view, to limit the number of cotemporaneous, or overlapping transmissions that are received at the base station. To cover a wide area, the limited field of view is swept across the area of coverage. To overcome potential losses caused by collisions, the remote terminal units are configured to repeat transmissions; to minimize repeated collisions, the repeat interval and/or duration is randomized.

US Patent:

8498569, Jul 30, 2013

Filed:

Mar 16, 2012

Appl. No.:

13/422195

Inventors:

Richard D. Fleeter - Reston VA, US
John E. Hanson - Mountain View CA, US
Scott A. McDermott - Washington DC, US

Assignee:

Comtech Mobile Datacom Corporation - Germantown MD

International Classification:

H04B 1/707
H04B 1/709

US Classification:

455 121, 455427, 455 21, 455102, 455 98, 455 39

Abstract:

A communication system is provided that allows the use of low-cost, low-power remote terminal units that communicate substantially asynchronously and independently to a base station. To minimize cost and complexity, the remote terminal units are configured similarly, including the use of substantially identical transmission schemes, such as a common Direct Sequence Spread Spectrum (DSSS) code. To minimize collisions among transmissions, the communication system is designed to use a high-gain antenna with a limited field of view, to limit the number of cotemporaneous, or overlapping transmissions that are received at the base station. To cover a wide area, the limited field of view is swept across the area of coverage. To overcome potential losses caused by collisions, the remote terminal units are configured to repeat transmissions; to minimize repeated collisions, the repeat interval and/or duration is randomized.

US Patent:

20120178362, Jul 12, 2012

Filed:

Mar 16, 2012

Appl. No.:

13/422173

Inventors:

Richard D. Fleeter - Reston VA, US
John E. Hanson - Mountain View CA, US
Scott A. McDermott - Washington DC, US

International Classification:

H04B 7/185

US Classification:

455 121

Abstract:

A communication system is provided that allows the use of low-cost, low-power remote terminal units that communicate substantially asynchronously and independently to a base station. To minimize cost and complexity, the remote terminal units are configured similarly, including the use of substantially identical transmission schemes, such as a common Direct Sequence Spread Spectrum (DSSS) code. To minimize collisions among transmissions, the communication system is designed to use a high-gain antenna with a limited field of view, to limit the number of cotemporaneous, or overlapping transmissions that are received at the base station. To cover a wide area, the limited field of view is swept across the area of coverage. To overcome potential losses caused by collisions, the remote terminal units are configured to repeat transmissions; to minimize repeated collisions, the repeat interval and/or duration is randomized.

US Patent:

53059794, Apr 26, 1994

Filed:

Mar 10, 1992

Appl. No.:

7/849279

Inventors:

John D. Hanson - Port Tobacco MD

International Classification:

G09F 700
G09F 716

US Classification:

248291

Abstract:

An assembly convertible between a raised house ID display sign configuration and a lowered support shelf configuration includes a lower base plate stationarily attached on a wall portion of a house adjacent to an entry door, an upper face plate mounting ID indicia to identify the house, and a plurality of hinges attached respectively between the lower base plate and upper face member to enable pivoting of the upper face plate relative to the lower base plate between the raised and lowered configurations. The assembly also includes an electrical light mounted at a side edge portion of the lower base plate to provide illumination to an area of the entry door adjacent thereto. The light is switched on and off by a button mounted on the lower base plate being respectively engaged and disengaged by the upper face plate when the assembly is correspondingly converted between the support shelf and ID display sign configurations.