Neville A Mathews

US Patent:

62982206, Oct 2, 2001

Filed:

Jan 14, 1999

Appl. No.:

9/231071

Inventors:

Andrew W. Barnhart - Gaithersburg MD
Michael Parr - Hermosa Beach CA
Neville Mathews - Rockville MD

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04B 100

US Classification:

455 69

Abstract:

A system for controlling/conserving signal transmission power in a communications system is disclosed. The system generally includes a first unit having a transmitter and a receiver, a second unit having a transmitter and a receiver, a forward communications channel between the first unit transmitter and the second unit receiver, and a reverse communications channel between the second unit transmitter and the first unit receiver. In operation, the system determines the received signal power needs of the second unit receiver. It then generates a reverse channel explicit-power-request command based on the determination of the received signal power needs of the second unit receiver. The reverse channel explicit-power-request command represents an absolute power level at which the first unit transmitter should transmit signals over the forward communications channel. In general, this reverse channel explicit-power-request command communicates the absolute power level in a manner that is independent of the power level at which the first unit transmitter had previously been transmitting with. The system also generates a forward channel explicit-power-notification message based on a determination of the transmitted signal power from the first unit transmitter.

US Patent:

56006535, Feb 4, 1997

Filed:

Sep 30, 1994

Appl. No.:

8/315485

Inventors:

Dattakumar M. Chitre - Silver Spring MD
Dilip S. Gokhale - Gaithersburg MD
Thomas Henderson - Bethesda MD
John A. Lunsford - Gaithersburg MD
Neville Mathews - Derwood MD

Assignee:

Comsat Corporation - Bethesda MD

International Classification:

H04L 100

US Classification:

370474

Abstract:

In an asynchronous transfer mode (ATM) system, interleaved cells are formed at the transmit end by combining into each interleaved cell certain bits from each of plural different original ATM cells, the interleaved cells are transmitted over the communications link, and then deinterleaved at the receive end. Any bursty errors occurring on the communications link will, after deinterleaving, be spread out over multiple original ATM cells, maximizing the error correction for ATM cells and error detection for AAL capability and minimizing loss of data. The C1 byte in the Physical Layer Convergence Protocol (PLCP), which indicates the location of end of the PLCP frame, is protected against the burst errors by replication of C1 byte through inserting them in the growth bytes Z1 through Z4.

Address:

2199 Isleworth Cir, The Villages, FL 32163

Phone:

(301)9639402

VIN:

KMHDU46D09U788464

Make:

HYUNDAI

Model:

ELANTRA

Year:

2009