Patrick Nercessian

US Patent:

20110053546, Mar 3, 2011

Filed:

Aug 19, 2010

Appl. No.:

12/859730

Inventors:

PHILLIP B. HESS - LOS ANGELES CA, US
PATRICK NERCESSIAN - BURBANK CA, US

Assignee:

ALFRED E. MANN FOUNDATION FOR SCIENTIFIC RESEARCH - SANTA CLARITA CA

International Classification:

H04B 1/10

US Classification:

455296

Abstract:

A system and method for improving the processing of communications signals received in the presence of narrowband interference signals. The received communications signals are time sampled and transformed into a series of spectral terms in the frequency domain that are then evaluated to identify narrowband interference signals. The identified narrowband interference terms can be calculated to a value that will optimize the corrupted spectral terms resulting from the communication, and an inverse transformation can be used to generate a time domain signal that is free from interference.

US Patent:

20210311192, Oct 7, 2021

Filed:

Apr 6, 2020

Appl. No.:

16/840873

Inventors:

- San Francisco CA, US
Vladimir Ilchenko - Arcadia CA, US
Kamel Benboudjema - Pasadena CA, US
Richard Kalantar Ohanian - Glendale CA, US
Patrick Nercessian - Burbank CA, US

International Classification:

G01S 17/34
G01S 17/931
G01S 7/4911
G01S 7/481
G01S 7/4912
G05D 1/02

Abstract:

A system comprises an optical heterodyne device, the optical heterodyne device configured to generate an overlap signal based upon: 1) a first optical signal output by a frequency-modulated continuous-wave (FMCW) laser, wherein the first optical signal comprises an optical frequency chirp that is based upon an input voltage signal received by the FMCW laser; and 2) a second optical signal output by a reference laser. The system also includes a photodetector that is optically coupled to the optical heterodyne device, the photodetector configured to output an electrical beat signal based upon the mixing of the optical signals, wherein the electrical beat signal is representative of the mixed down optical signal. The system further includes a frequency analyzer system that generates, based upon the electrical beat signal, data that is indicative of linearity of the optical frequency chirp in the first optical signal.