James E Justiss

US Patent:

6704544, Mar 9, 2004

Filed:

Jun 28, 2000

Appl. No.:

09/605775

Inventors:

Jamal Sarraf - Irvine CA
Edward J. Fitzpatrick - Rancho Palos Verdes CA
James E. Justiss - Rancho Palos Verdes CA
Remberto Martin - Walnut CA
Michelle J. Glaser-Weiner - Manhattan Beach CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04B 7185

US Classification:

455 131, 455 17, 455 22, 455429

Abstract:

A payload design for a multi-spot-beam satellite communication system includes a plurality of uplink spot beam receivers and downlink spot beam transmitters, and a broadcast transmitting subsystem capable of transmitting a broadcast beam to an entire system geographical service area. An input filter-switch-matrix (IFSM) controllably selects input IF signal bands for routing to an on-board digital signal processor-router (DSPR). The DSPR subsequently routes all received point-to-point and broadcast data packets to the appropriate downlink spot or broadcast transmitting subsystems for transmission thereof. The broadcast downlink allows broadcast transmissions to occur at the highest efficiency possible, while also allowing for flexible provision of surge capacity for point-to-point transmissions on previously exhausted spot beams by selective use of the broadcast beam for such point-to-point transmissions.

US Patent:

7925208, Apr 12, 2011

Filed:

Oct 28, 2003

Appl. No.:

10/695723

Inventors:

Jamal Sarraf - Irvine CA, US
Edward J. Fitzpatrick - Rancho Palos Verdes CA, US
James E. Justiss - Rancho Palos Verdes CA, US
Remberto Martin - Walnut CA, US
Michelle J. Glaser-Weiner - Manhattan Beach CA, US

Assignee:

The DIRECTV Group, Inc. - El Segundo CA

International Classification:

H04B 7/185

US Classification:

455 121, 455 131, 455 17, 455 22, 370319, 370352, 370353

Abstract:

A payload design for a multi-spot-beam satellite communication system includes a plurality of uplink spot beam receivers and downlink spot beam transmitters, and a broadcast transmitting subsystem capable of transmitting a broadcast beam to an entire system geographical service area. An input filter-switch-matrix (IFSM) controllably selects input IF signal bands for routing to an on-board digital signal processor-router (DSPR). The DSPR subsequently routes all received point-to-point and broadcast data packets to the appropriate downlink spot or broadcast transmitting subsystems for transmission thereof. The broadcast downlink allows broadcast transmissions to occur at the highest efficiency possible, while also allowing for flexible provision of surge capacity for point-to-point transmissions on previously exhausted spot beams by selective use of the broadcast beam for such point-to-point transmissions.

US Patent:

20020168972, Nov 14, 2002

Filed:

May 11, 2001

Appl. No.:

09/853475

Inventors:

James Justiss - Rancho Palos Verdes CA, US
John Weisinger - Palos Verdes Estates CA, US

International Classification:

H04Q007/20

US Classification:

455/427000, 455/012100, 455/063000

Abstract:

A method of digitally canceling interference on a received signal within a satellite payload using an interference reference feedforward signal is provided. The satellite payload of the present invention receives a communication signal with interference via a first antenna The communication signal is converted into a received signal and transferred to into a first input of a satellite payload circuit The satellite payload circuit has the first input a second input and an output The output is electrically coupled to the second input by a feedforward signal path The satellite payload circuit adaptively cancels interference on the received signal using an interference reference feedforward signal that is transferred from the output to the second input via the feedforward signal path

US Patent:

60848693, Jul 4, 2000

Filed:

Oct 6, 1997

Appl. No.:

8/944357

Inventors:

Barry Fishman - San Pedro CA
James E. Justiss - Rancho Palos Verdes CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04L 1228

US Classification:

370348

Abstract:

A method and system for reserving channel resources in a random-access, multiple-path communication system utilizes a transmit group addressing arrangement for a reservation packet. A transceiver terminal wanting to transmit a signal must first send a reservation request packet to a packet router. Each reservation request packet includes an address header identifying the entire group of terminals to which the transmitting terminal belongs as the destination for the reservation request packet, and a data segment identifying the terminal and the channel resources to be reserved. After the reservation request packet is transmitted to the packet router, each terminal in the transmit group will determine the order of transmission depending on the sequence in which all reservation packets are received from the router. When a terminal begins transmission, a synchronization packet is sent as an indicator for allowing the remaining terminals to predict the end of transmission.

US Patent:

61757195, Jan 16, 2001

Filed:

Jun 25, 1997

Appl. No.:

8/882119

Inventors:

Jamal Sarraf - Irvine CA
Edward J. Fitzpatrick - Rancho Palos Verdes CA
James E. Justiss - Rancho Palos Verdes CA
Remberto Martin - Walnut CA
Michelle J. Glaser-Weiner - Manhattan Beach CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04B 7185

US Classification:

455 131

Abstract:

A payload design for a multi-spot-beam satellite communication system includes a plurality of uplink spot beam receivers and downlink spot beam transmitters, and a broadcast transmitting subsystem capable of transmitting a broadcast beam to an entire system geographical service area. An input filter-switch-matrix (IFSM) controllably selects input IF signal bands for routing to an on-board digital signal processor-router (DSPR). The DSPR subsequently routes all received point-to-point and broadcast data packets to the appropriate downlink spot or broadcast transmitting subsystems for transmission thereof. The broadcast downlink allows broadcast transmissions to occur at the highest efficiency possible, while also allowing for flexible provision of surge capacity for point-to-point transmissions on previously exhausted spot beams by selective use of the broadcast beam for such point-to-point transmissions.

US Patent:

6219528, Apr 17, 2001

Filed:

Jun 29, 1998

Appl. No.:

9/106651

Inventors:

David A. Wright - Solana Beach CA
James E. Justiss - Rancho Palos Verdes CA
Jean Tsao - Hermosa Beach CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04B 7185

US Classification:

455 134

Abstract:

The disclosure describes a method of adjusting a reference level for uplink signal power for use in a dynamic power control system with satellite-based measurements in a satellite communications system. The uplink signal power for a plurality of received uplink signals is measured and combined to determine whether a signal power reference level requires adjustment. The signal powers of a plurality of uplink signals are measured at the satellite and the received signals are validated to ensure the signals are acceptable for use in adjusting the reference level. The valid signals are used to calculate an average signal power of the measured uplink signal powers, with the calculated average being compared to the current value of the reference level. Based on the comparison, the reference level either retains the current value or is reset to an adjusted value.