Jeffrey P Long

US Patent:

7224743, May 29, 2007

Filed:

Apr 24, 2003

Appl. No.:

10/422083

Inventors:

Michael J. Holmes - Long Beach CA, US
Scott W. Enserink - Long Beach CA, US
Jeffrey P. Long - Woburn MA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H04L 23/02
H04L 5/12

US Classification:

375265, 375261, 375341, 375792, 375795

Abstract:

A method and apparatus for decoding trellis-coded digital data. Digital data samples that have been convolutionally encoded by trellis-coded modulation (TCM) for purposes of forward error correction require a computationally intensive Viterbi decoder for best performance. A technique known as pragmatic trellis-code modulation (PTCM) reduces decoder complexity but at the expense of degraded performance in some situations. This disclosure provides a solution that retains the reduced complexity of PTCM, but uses a full trellis approach that yields significantly better performance in terms of bit error rate (BER).

US Patent:

20110171518, Jul 14, 2011

Filed:

Mar 21, 2011

Appl. No.:

13/052596

Inventors:

Bruce Dunn - Los Angeles CA, US
Jeffrey W. Long - Alexandria VA, US
Debra R. Rolison - Arlington VA, US
Henry S. White - Salt Lake City UT, US
Fred Wudl - Los Angeles CA, US
Sarah H. Tolbert - Encino CA, US
Chang-Jin Kim - Beverly Hills CA, US

International Classification:

H01M 4/32
H01M 4/38
H01M 2/02
H01M 10/04

US Classification:

429163, 429223, 429229, 296231

Abstract:

A three-dimensional electrode structure for use in a battery comprising a porous three-dimensional substrate formed from a first electrically conductive material, an ion-conducting dielectric material disposed on the porous three dimensional substrate, and a second electrically conductive material disposed on the ion-conducting dielectric material, wherein the ion-conducting dielectric material separates the first electrically conductive material from the second electrically conductive material.