David A Landon

US Patent:

8279122, Oct 2, 2012

Filed:

Mar 27, 2012

Appl. No.:

13/431761

Inventors:

David Glen Landon - Salt Lake City UT, US
Cynthia Furse - Salt Lake City UT, US

Assignee:

University of Utah - Salt Lake City UT

International Classification:

H01Q 1/38

US Classification:

343700MS, 343846

Abstract:

A wireless communication system can include polarization agile antennas to enable adaptation to the polarization characteristics of a changing propagation channel. In one embodiment, a mobile terminal can include one or more polarization-agile antennas, and can select polarization orientations that are preferentially propagated through the changing propagation channel. In another embodiment, a mobile terminal having two polarization-agile antennas can provide spatial diversity, polarization diversity, or combinations of both. Multiple-input multiple-output (MIMO) systems can include polarization-agile antennas to allow for switching between spatial and polarization diversity, combined spatial and polarization diversity, and various Eigen channel decompositions using spatial, polarization, and combined spatial and polarization dimensions. An extended polar normalization provides enhanced fidelity for methods of communications system modeling.

US Patent:

8456374, Jun 4, 2013

Filed:

Oct 28, 2009

Appl. No.:

12/589770

Inventors:

Zachary C. Bagley - Salt Lake City UT, US
Marc J. Russon - Salt Lake City UT, US
David G. Landon - Bountiful UT, US

Assignee:

L-3 Communications, Corp. - Salt Lake City UT

International Classification:

H01Q 21/10
H01Q 9/28

US Classification:

343810, 343795, 343895

Abstract:

In one exemplary embodiment, an antenna arrangement includes: a substrate; and a plurality of dipole antenna elements disposed on the substrate, wherein the plurality of dipole antenna elements are randomly-oriented with respect to each other. In further exemplary embodiments, the plurality of dipole antenna elements includes at least six dipoles that are all electrically fed and do not need to be magnetically fed in order to generate and detect an arbitrary polarization. In still further exemplary embodiments, each dipole element has a fractal shape.

US Patent:

20120064825, Mar 15, 2012

Filed:

Dec 18, 2007

Appl. No.:

11/959322

Inventors:

David Glen Landon - Salt Lake City UT, US
Cynthia Furse - Salt Lake City UT, US

International Classification:

H04B 7/24
H01Q 19/00

US Classification:

455 39, 343756

Abstract:

A wireless communication system can include polarization agile antennas to enable adaptation to the polarization characteristics of a changing propagation channel. In one embodiment, a mobile terminal can include one or more polarization-agile antennas, and can select polarization orientations that are preferentially propagated through the changing propagation channel. In another embodiment, a mobile terminal having two polarization-agile antennas can provide spatial diversity, polarization diversity, or combinations of both. Multiple-input multiple-output (MIMO) systems can include polarization-agile antennas to allow for switching between spatial and polarization diversity, combined spatial and polarization diversity, and various Eigen channel decompositions using spatial, polarization, and combined spatial and polarization dimensions. An extended polar normalization provides enhanced fidelity for methods of communications system modeling.

US Patent:

20230078796, Mar 16, 2023

Filed:

Sep 16, 2021

Appl. No.:

17/447849

Inventors:

- MELBOURNE FL, US
DAVID G. LANDON - BOUNTIFUL UT, US
EDWIN J. HEMPHILL - KAYSVILLE UT, US
DAVID S. NELSON - SALT LAKE CITY UT, US

International Classification:

H04B 1/7115

Abstract:

A radio frequency (RF) rake receiver may include a plurality of diversity receive paths, with each diversity receive path including a respective rake receiver despreader, and a tracking loop. The tracking loop may be configured to generate a composite timing signal based upon the rake receiver despreaders, and provide the composite timing signal to the diversity receive paths.

US Patent:

20230010703, Jan 12, 2023

Filed:

Jul 9, 2021

Appl. No.:

17/372207

Inventors:

- Melbourne FL, US
L Andrew Gibson - Riverton UT, US
David G. Landon - Bountiful UT, US
Alexander Kimani - Grantsville UT, US

International Classification:

H04B 1/00
H04B 7/08
H04B 1/16
H04B 1/04

Abstract:

Systems and methods for mitigating an effect interference. The methods comprise: receiving, by a device, a signal comprising a plurality of signal components; determining whether each signal component has a sufficient reconstructability; reconstructing each said signal component that was determined to have sufficient reconstructability using the received signal or an at least partially clean signal with other signal component(s) removed from the received signal; and using the reconstructed signal components to generate a modified received comprising the received signal with the signal components removed therefrom that (i) are devoid of a signal of interest and (ii) have sufficient reconstructability.

US Patent:

20230006710, Jan 5, 2023

Filed:

Jul 1, 2021

Appl. No.:

17/365910

Inventors:

- Melbourne FL, US
L. Andrew Gibson - Riverton UT, US
Christopher L. Brown - Sandy UT, US
David G. Landon - Bountiful UT, US
Edwin R. Twitchell - Fruit Heights UT, US

International Classification:

H04B 1/715

Abstract:

Suppressing interference in a frequency hopping signal. The method includes receiving a frequency hopping signal for a signal of interest. The frequency hopping signal includes the signal of interest modulated using frequency hopping and wideband and narrowband interference. Prior to de-hopping the frequency hopping signal, one or more wideband interferences in the frequency hopping signal are identified. The one or more wideband interferences are suppressed to create a wideband interference suppressed signal. Subsequent to suppressing the one or more wideband interferences, the wideband interference suppressed signal is de-hopped to create a de-hopped signal. In the de-hopped signal, one or more narrowband interferences are identified. The one or more narrowband interferences are suppressed to create an interference suppressed signal. The interference suppressed signal is demodulated to create a demodulated signal.