Donald Robert Sentz

US Patent:

20020102991, Aug 1, 2002

Filed:

Jan 26, 2001

Appl. No.:

09/771474

Inventors:

Donald Sentz - Beverly Hills CA, US

International Classification:

H04Q007/20

US Classification:

455/456000, 455/562000

Abstract:

A method () for providing communication bandwidth with a communication satellite includes reading () communication target positions from a position memory and electronically steering () an antenna in accordance with the target positions to provide bandwidth to the communication target. In addition, the method receives () updated communication target positions in an uplink and responsively updates () the communication target positions in the memory. Thus, each communication target independently exercises control over the pointing of the beam spot assigned to that communication target. The beam spot may be narrow (e.g., between 0.9 and 3.5 degrees in angular diameter) and thus provide high gain. A predetermined access schedule (e.g., a fixed length time division multiplexed frame) may be enforced to provide communication access for each communication target.

US Patent:

58987282, Apr 27, 1999

Filed:

Nov 22, 1996

Appl. No.:

8/755521

Inventors:

Donald R. Sentz - Beverly Hills CA
Vincent C. Moretti - Torrance CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H04B 1500
H04K 100
H04L 2730
H04J 100

US Classification:

375202

Abstract:

A system and method for frequency dehopping of spread spectrum communication signals includes a downconverter having two mixer stages, each mixer stage providing coarse frequency dehopping. The local oscillator injection frequency of each mixer stage is selectable by way of a plurality of relatively easily generated tones. The output of the second mixer stage is sampled by an analog-to-digital converter to enable fine tuning dehopping to be performed in the digital domain and subsequently demodulated in a demodulator circuit.