Faranak Nekoogar

US Patent:

7305052, Dec 4, 2007

Filed:

Mar 31, 2004

Appl. No.:

10/815450

Inventors:

Alex Spiridon - Palo Alto CA, US
Dave Benzel - Livermore CA, US
Farid U. Dowla - Castro Valley CA, US
Faranak Nekoogar - San Ramon CA, US
Erwin T. Rosenbury - Castro Valley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H04L 27/08
H04L 27/00
H04B 1/00
H04B 7/165
H01Q 11/12

US Classification:

375345, 375147, 375259, 455 23, 455118

Abstract:

A novel technique and structure that maximizes the extraction of information from reference pulses for UWB-TR receivers is introduced. The scheme efficiently processes an incoming signal to suppress different types of UWB as well as non-UWB interference prior to signal detection. Such a method and system adds a feedback loop mechanism to enhance the signal-to-noise ratio of reference pulses in a conventional TR receiver. Moreover, sampling the second order statistical function such as, for example, the autocorrelation function (ACF) of the received signal and matching it to the ACF samples of the original pulses for each transmitted bit provides a more robust UWB communications method and system in the presence of channel distortions.

US Patent:

7970047, Jun 28, 2011

Filed:

Dec 27, 2006

Appl. No.:

11/646886

Inventors:

Faranak Nekoogar - San Ramon CA, US
Farid U. Dowla - Castro Valley CA, US
Alex Spiridon - Palo Alto CA, US
Peter C. Haugen - Livermore CA, US
Dave M. Benzel - Livermore CA, US

Assignee:

Lawrence Livermore National Security, LLC - Livermore CA

International Classification:

H03K 7/04

US Classification:

375239

Abstract:

The present invention presents a simple and novel channel estimation scheme for UWB communication systems. As disclosed herein, the present invention maximizes the extraction of information by incorporating a new generation of transmitted-reference (Tr) transceivers that utilize a single reference pulse(s) or a preamble of reference pulses to provide improved channel estimation while offering higher Bit Error Rate (BER) performance and data rates without diluting the transmitter power.

US Patent:

8102955, Jan 24, 2012

Filed:

Sep 15, 2008

Appl. No.:

12/210827

Inventors:

Faranak Nekoogar - San Ramon CA, US
Farid U. Dowla - Castro Valley CA, US

Assignee:

Lawrence Livermore National Security, LLC - Livermore CA

International Classification:

H03D 1/04
H03D 1/06
H03K 5/01
H03K 6/04
H04B 1/10
H04L 1/00
H04L 25/08

US Classification:

375346, 327310, 327384, 327551

Abstract:

The multi-pulse frequency shifted technique uses mutually orthogonal short duration pulses o transmit and receive information in a UWB multiuser communication system. The multiuser system uses the same pulse shape with different frequencies for the reference and data for each user. Different users have a different pulse shape (mutually orthogonal to each other) and different transmit and reference frequencies. At the receiver, the reference pulse is frequency shifted to match the data pulse and a correlation scheme followed by a hard decision block detects the data.

US Patent:

8188841, May 29, 2012

Filed:

Aug 31, 2007

Appl. No.:

11/897773

Inventors:

Farid U. Dowla - Castro Valley CA, US
Faranak Nekoogar - San Ramon CA, US
David M. Benzel - Livermore CA, US
Gregory E. Dallum - Livermore CA, US
Alex Spiridon - Palo Alto CA, US

Assignee:

Lawrence Livermore National Security, LLC - Livermore CA

International Classification:

H04Q 5/22

US Classification:

340 1034, 340 1033, 340 101, 4554562, 4554561

Abstract:

A new Radio Frequency Identification (RFID), tracking, powering apparatus/system and method using coded Ultra-wideband (UWB) signaling is introduced. The proposed hardware and techniques disclosed herein utilize a plurality of passive UWB transponders in a field of an RFID-radar system. The radar system itself enables multiple passive tags to be remotely powered (activated) at about the same time frame via predetermined frequency UWB pulsed formats. Once such tags are in an activated state, an UWB radar transmits specific “interrogating codes” to put predetermined tags in an awakened status. Such predetermined tags can then communicate by a unique “response code” so as to be detected by an UWB system using radar methods.

US Patent:

8451164, May 28, 2013

Filed:

Feb 9, 2011

Appl. No.:

13/024105

Inventors:

Farid Dowla - Castro Valley CA, US
Faranak Nekoogar - San Ramon CA, US

Assignee:

Lawrence Livermore National Security, LLC. - Livermore CA

International Classification:

G01S 13/00

US Classification:

342 59, 342 61, 342 73

Abstract:

In one embodiment, a radar communication system includes a plurality of radars having a communication range and being capable of operating at a sensing frequency and a reporting frequency, wherein the reporting frequency is different than the sensing frequency, each radar is adapted for operating at the sensing frequency until an event is detected, each radar in the plurality of radars has an identification/location frequency for reporting information different from the sensing frequency, a first radar of the radars which senses the event sends a reporting frequency corresponding to its identification/location frequency when the event is detected, and all other radars in the plurality of radars switch their reporting frequencies to match the reporting frequency of the first radar upon detecting the reporting frequency switch of a radar within the communication range. In another embodiment, a method is presented for communicating information in a radar system.

US Patent:

8502729, Aug 6, 2013

Filed:

Jan 29, 2007

Appl. No.:

11/699638

Inventors:

Faranak Nekoogar - San Ramon CA, US
Peter C. Haugen - Livermore CA, US

Assignee:

Lawrence Livermore National Security, LLC - Livermore CA

International Classification:

G01S 13/88
G01S 13/56
G08B 13/181

US Classification:

342 28, 340552, 342 21

Abstract:

Ultra wideband radar motion sensors strategically placed in an area of interest communicate with a wireless ad hoc network to provide remote area surveillance. Swept range impulse radar and a heart and respiration monitor combined with the motion sensor further improves discrimination.

US Patent:

20040202230, Oct 14, 2004

Filed:

Jul 30, 2003

Appl. No.:

10/631560

Inventors:

Farid Dowla - Castro Valley CA, US
Faranak Nekoogar - San Ramon CA, US

Assignee:

The Regents of the University of California.

International Classification:

H04B001/707

US Classification:

375/147000

Abstract:

A new modulation scheme in UWB communications is introduced. This modulation technique utilizes multiple orthogonal transmitted-reference pulses for UWB channelization. The proposed UWB receiver samples the second order statistical function at both zero- and non-zero lags and matches the samples to stored second order statistical functions, thus sampling and matching the shape of second order statistical functions rather than just the shape of the received pulses. Sampling of non-zero second order statistical function lags is a significant new approach. Since UWB pulses experience channel distortion due to noise, fading and multipath, their shape can be quite different at the receiver, making the pulse detection difficult. However, second order statistical functions preserve their shape despite channel distortion. Therefore, sampling the second order statistical function such as, for example, the autocorrelation function (ACF) of the received signal and matching it to the ACF samples of the original pulses for each transmitted bit, provides a more robust UWB communications in the presence of channel distortions.

US Patent:

20050286610, Dec 29, 2005

Filed:

Jun 24, 2005

Appl. No.:

11/165867

Inventors:

Farid Dowla - Castro Valley CA, US
Faranak Nekoogar - San Ramon CA, US
Alex Spiridon - Palo Alto CA, US

International Classification:

H04B001/69
H04B001/707

US Classification:

375130000

Abstract:

A novel UWB communications method and system that provides self-organization for wireless sensor networks is introduced. The self-organization is in terms of scalability, power conservation, channel estimation, and node synchronization in wireless sensor networks. The UWB receiver in the present invention adds two new tasks to conventional TR receivers. The two additional units are SNR enhancing unit and timing acquisition and tracking unit.