Randolph L Durrant

US Patent:

6501955, Dec 31, 2002

Filed:

Jun 19, 2000

Appl. No.:

09/596653

Inventors:

Randolph L. Durrant - Colorado Springs CO
Logan Scott - Breckenridge CO
John K. Reece - Colorado Springs CO

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H04Q 720

US Classification:

455456, 455 7, 342453

Abstract:

A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includes a signal tagging means that adds a unique electronic signature to the repeated signal such that position determination errors due to a non-line of sight propagation path can be corrected. The repeated signal is received and processed with a location measurement unit to determine the time of arrival and to extract the signal tag of the repeated signal. The time of arrival measurement and recovered signal tag are then processed at a mobile location center to determine the true position of the transmitter.

US Patent:

6839539, Jan 4, 2005

Filed:

Jun 17, 2002

Appl. No.:

10/173912

Inventors:

Randolph L. Durrant - Colorado Springs CO, US
Logan Scott - Breckenridge CO, US
John K. Reece - Colorado Springs CO, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H04B 715
H04Q 720

US Classification:

455 111, 4554565, 455 23

Abstract:

A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includes a signal tagging means that adds a unique electronic signature to the repeated signal such that position determination errors due to a non-line of sight propagation path can be corrected. The repeated signal is received and processed with a location measurement unit to determine the time of arrival and to extract the signal tag of the repeated signal. The time of arrival measurement and recovered signal tag are then processed at a mobile location center to determine the true position of the transmitter.

US Patent:

7061924, Jun 13, 2006

Filed:

May 24, 2001

Appl. No.:

09/866505

Inventors:

Randolph L. Durrant - Colorado Springs CO, US
Benjamin K. Gibbs - Colorado Springs CO, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H04L 12/28

US Classification:

370401, 370315

Abstract:

A monitoring system includes a central gateway. The central gateway is configured to interface the monitoring system to a WAN. The monitoring system also includes a network of radio telemetry devices. Each radio telemetry device includes a monitoring device, a radio module configured to communicate with other radio telemetry devices and the central gateway, and a processor. The radio telemetry device can be configured to acquire monitoring data and forward it to the central gateway. The radio telemetry device can also be configured to relay monitoring data from other radio telemetry devices to the central gateway allowing for the use of short range, low power radio modules.

US Patent:

7116938, Oct 3, 2006

Filed:

Dec 26, 2002

Appl. No.:

10/329958

Inventors:

Robert L. Monroe - Colorado Springs CO, US
Randolph L. Durrant - Colorado Springs CO, US
Krishnan Rajamani - San Diego CA, US
Gordon Chinn - San Jose CA, US
James P. Kardach - Saratoga CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H04B 7/00

US Classification:

455 412, 4554351, 4554352, 455450, 455455, 4555501, 4555521, 4555531, 370338, 370345, 370466

Abstract:

Methods and apparatus are disclosed for mitigating radio frequency interference between transceiver systems within an electronic device.

US Patent:

20040063403, Apr 1, 2004

Filed:

Sep 30, 2002

Appl. No.:

10/261977

Inventors:

Randolph Durrant - Colorado Springs CO, US

International Classification:

H04L007/00

US Classification:

455/041200

Abstract:

In one embodiment, the invention provides a method for operating a Bluetooth receiver. The method comprises sampling energy levels at selected frequencies within a frequency spectrum; comparing the sampled energy levels to an energy distribution pattern for a wideband signal; and identify a presence of the wideband signal if the sampled energy levels match the energy distribution pattern.

US Patent:

20040097190, May 20, 2004

Filed:

Nov 18, 2003

Appl. No.:

10/715621

Inventors:

Randolph Durrant - Colorado Springs CO, US
Logan Scott - Breckenridge CO, US
John Reece - Colorado Springs CO, US

International Classification:

G01S001/00
H04B007/14
H04B003/36

US Classification:

455/007000, 455/456100, 342/357100

Abstract:

A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includes a signal tagging means that adds a unique electronic signature to the repeated signal such that position determination errors due to a non-line of sight propagation path can be corrected. The repeated signal is received and processed with a location measurement unit to determine the time of arrival and to extract the signal tag of the repeated signal. The time of arrival measurement and recovered signal tag are then processed at a mobile location center to determine the true position of the transmitter.

US Patent:

20040203398, Oct 14, 2004

Filed:

Sep 30, 2002

Appl. No.:

10/262280

Inventors:

Randolph Durrant - Colorado Springs CO, US

International Classification:

H04B005/00
H04B001/10

US Classification:

455/063100, 455/041200

Abstract:

In one embodiment, the invention provides a method comprising performing a channel assessment of predefined communications channels, each centered on a particular frequency within a frequency band, the channel assessment comprising determining if interference on each predefined channel is above a predefined energy threshold, wherein the predefined communications channels are visited in a predefined sequence in which those predefined channels in which interference from specific types of interferers known to operate in the frequency band is likely are visited first. The method also comprises disabling those communications channels on which interference above the predefined energy threshold is detected.

US Patent:

58320288, Nov 3, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/480914

Inventors:

Randolph L. Durrant - Colorado Springs CO
Mark Burbach - Peyton CO

Assignee:

Omnipoint Corporation - Colorado Springs CO

International Classification:

H04B 1500
H04K 100
H04L 2730

US Classification:

375208

Abstract:

A technique for modulating and demodulating CPM spread spectrum signals and variations of CPM spread spectrum signals. A transmitter divides a signal data stream into a plurality of data streams (such as I and Q data streams), independently modulates the I and Q data streams using CPM or a related technique, and superposes the plurality of resultants for transmission. A receiver receives the superposed spread spectrum signal and simultaneously attempts to correlate for a plurality of chip sequences (such as I and Q chip sequences), and interleaves the correlated I and Q data streams into a unified signal data stream. In one embodiment, the receiver separates the received spread spectrum signal into real and imaginary parts, attempts to correlate both real and imaginary parts for a plurality of chip sequences, and combines the real I, real Q, imaginary I, and imaginary Q signals into a unified signal data stream. The demodulating reference signal in the receiver may or may not be frequency or phase matched with the transmitter. In other embodiments, single bit or multi-bit digitization of the received spread spectrum signal for both I and Q signals (or real I, real Q, imaginary I, and imaginary Q signals) is carried out prior to correlation.