Kyle Mokhtar Gallagher

US Patent:

20210263132, Aug 26, 2021

Filed:

Feb 11, 2021

Appl. No.:

17/173680

Inventors:

- Adelphi MD, US
Kyle A. Gallagher - Silver Spring MD, US
Daniel T. Galanos - Silver Spring MD, US
Abigail S. Hedden - Vienna VA, US
Roger P. Cutitta - Westminster MD, US

International Classification:

G01S 7/288
G01S 7/292
G01S 13/00

Abstract:

According to embodiments, a radar system includes: at least one radio receiver which is comprised of: an antenna configured to receive RF data including both the direct-path RF signal transmitted from a radio transmitter and a reflected RF signal when the transmitted RF signal is reflected from the target; a memory configured to store the same predetermined RF waveform profile data used by the transmitter to generate and transmit the RF signal; a timing unit to provide timing; a matched filter application configured to generate and apply a matched filter for identifying RF signal signatures in RF data; and one or more processors configured to: (i) analyze the received RF data to identify multiple, repeated, individual RF signals corresponding to the direct-path transmitted RF signal; (ii) split the identified RF signals corresponding to the direct-path transmitted RF signal into a plurality of repeating units each having an interval time; (iii) create a matched filter using the predetermined transmit waveform (stored in memory) and apply the matched filter to each of repeating units to provide (a) a plurality of direct-path transmitted RF signal arrival times; and (b) a plurality of reflected RF signal arrival times; (iv) adjust relative arrival times and phases of the repeating units of the direct-path transmitted RF signal; and (v) generate radar data from the reflected RF signal further using the adjusted times and phases for arrival times of the repeating units of the direct-path transmitted RF signal.

US Patent:

20210135703, May 6, 2021

Filed:

Oct 30, 2019

Appl. No.:

16/668627

Inventors:

- Adelphi MD, US
Kyle A. Gallagher - Silver Spring MD, US
Kelly D. Sherbondy - Burke VA, US

International Classification:

H04B 1/7113
H04W 16/14
G01S 7/40
G06N 3/12
H04W 52/24

Abstract:

A method and system for providing a cooperative spectrum sharing model that jointly optimizes primary user equipment parameters for improved frequency agility and performance while mitigating mutual interference between the primary user equipment and secondary user equipment. Spectrum sensing is implemented to form a power spectral estimate of the electromagnetic environment (EME) and apply multi-objective optimization to adjust the operational parameters of the primary user equipment to mitigate interference.

US Patent:

20200025915, Jan 23, 2020

Filed:

Jul 20, 2018

Appl. No.:

16/040597

Inventors:

- Adelphi MD, US
Kyle A. Gallagher - Silver Spring MD, US
Kelly D. Sherbondy - Burke VA, US

International Classification:

G01S 15/02
G01S 13/86
G01R 23/165
G01S 13/04

Abstract:

A method and apparatus for detecting an object comprising a radio frequency transmitter for transmitting a radio frequency signal towards an object; an acoustic signal transmitter for transmitting an acoustic signal capable of causing intermittent contact of conductive and/or semi-conductive junctions of the object; and a radio frequency receiver for receiving the radio frequency signal after the radio frequency signal is reflected from the object, where the received radio frequency signal has been altered by the intermittent contact of conductive and/or semi-conductive junctions of the object.

US Patent:

20190049575, Feb 14, 2019

Filed:

Aug 8, 2017

Appl. No.:

15/671579

Inventors:

- Adelphi MD, US
Gregory James Mazzaro - Charleston SC, US
Kyle Alexander Gallagher - Derwood MD, US
Stephen Freeman - Ellicott City MD, US

Assignee:

U.S. Army Research Laboratory ATTN: RDRL-LOC-I - Adelphi MD

International Classification:

G01S 13/90
G01S 1/30
G01S 19/42
G01S 13/58
G01S 13/78

Abstract:

A radar assembly for receiving signals at spaced frequencies from an unknown transmitting source comprising a receiver operative to receive signals; the receiver comprising a series of channels, each channel comprising a low pass filter configured to allow passage of a signal from an unknown transmitting source, an analog to digital converter configured to transform the signal from the unknown transmitting source to a digital signal, a Hilbert transform configured to transform the digital signal from the unknown transmitting source into a single sideband signal, a Fourier transform configured to transform the single sideband signal into a plurality of regularly spaced frequency samples, and an inverse Fourier transform for extracting regularly spaced frequency samples; whereby extracted pulses form a train of pulses that are inputted into an imager which utilizes synthetic aperture radar to form an image of the area of interest containing the unknown transmitting device and method thereof.

US Patent:

20170307726, Oct 26, 2017

Filed:

Apr 20, 2016

Appl. No.:

15/133276

Inventors:

- Adelphi MD, US
Kyle A. Gallagher - Derwood MD, US
Kenneth I. Ranney - Rockville MD, US
Anthony F. Martone - Ellicott City MD, US

International Classification:

G01S 7/292
G01S 7/41

Abstract:

Embodiments of the present invention concern locating targets using non-linear radar with a matched filter which uses exponential value of the transmit signal. According to embodiments, a method of non-linear radar target location includes: transmitting a signal of a transmit waveform towards a target; receiving a signal from the target; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. In other embodiments, the matched filtering may be combined with sidelobe reduction.

US Patent:

20160282457, Sep 29, 2016

Filed:

Apr 8, 2016

Appl. No.:

15/093788

Inventors:

- Adelphi MD, US
Kenneth I. Ranney - Rockville MD, US
Kyle A. Gallagher - Derwood MD, US
Anthony F. Martone - Ellicott City MD, US

Assignee:

U.S. Army Research Laboratory ATTN: RDRL-LOC-I - Adelphi MD

International Classification:

G01S 13/10
G01S 7/28

Abstract:

Method for determining distance to target using a multitone nonlinear radar system comprising providing a transmitter that transmits a signal comprising at least two predetermined frequency components; receiving transmitted signal upon reflection from target; determining the phase relationships of the frequency components when signal strikes target; determining distance the signal has travelled to target based upon the phase relationship of the frequency signal components at the time of reflection from target; computing the distance to target. A system comprising a transmitter subsystem that transmits radar signal comprising at least two frequency components; a receiver subsystem configured to receive a return signal comprising intermodulation and harmonic products; at least one processor configured to extract frequency samples from the return signal within a frequency range, apply a window function to the extracted frequency samples and perform an inverse fast Fourier transform on the resulting function to create a range profile.

US Patent:

20160209494, Jul 21, 2016

Filed:

May 4, 2015

Appl. No.:

14/703038

Inventors:

- Adelphi MD, US
Kyle A. Gallagher - Derwood MD, US

International Classification:

G01S 7/40

Abstract:

A novel methodology for automatically linearizing a harmonic radar transmitter—termed Feed-Forward Filter Reflection (FFFR)—is disclosed. The method combines the reflected second harmonic from a filter with the signal passing directly through the filter. The second harmonic from these two paths are combined with equal and opposite amplitudes to reduce the second harmonic beyond filtering alone. This methodology has been experimentally verified at transmit frequencies between 800 and 1000 MHz. Implemented properly, the technique provides greater than 100 dB rejection between 1.6 and 2.0 GHz. Although the tuning has been automated, further optimization is possible. Automated tuning is demonstrated over 400 MHz of bandwidth with a minimum cancellation of 110 dB. One application for the harmonic cancellation is to create a linear radar transmitter for the remote detection of non-linear targets.