Matthew R Perkins

US Patent:

6542270, Apr 1, 2003

Filed:

Dec 8, 2000

Appl. No.:

09/733717

Inventors:

Matthew R. Perkins - Sunrise FL
Robert E. Stengel - Pompano Beach FL
Vernon A. Allen - Sunrise CA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 1000

US Classification:

359154, 359181, 359136

Abstract:

An interference-robust coded-modulation scheme for optical communications and a method for modulating illumination for optical communications include optical signal transmitters connected to signal multipliers. The signal to be transmitted is multiplied by a pseudo-random noise code and transmitted within the transmitter emissions. A receiver converts the received modulated light and correlates the received signal. An estimate of the signal to be transmitted is made by multiplying the received signal by the noise code and correlating such multiplication over the length of the code. A threshold switch outputs the correlation result to a bit estimator approximately when a deterministic peak of the output signal exceeds a threshold.

US Patent:

6594247, Jul 15, 2003

Filed:

Feb 12, 2001

Appl. No.:

09/781142

Inventors:

Matthew R. Perkins - Sunrise FL
Vernon Anthony Allen - Sunrise FL
Robert J. ODea - Fort Lauderdale FL
Juan Carlos Palacios - Plantation FL
Priscilla L. Chen - Sunrise FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 12403

US Classification:

370341, 370447, 370462, 455520

Abstract:

A contention resolution method includes the steps of determining a contention has occurred and requesting contention resolution from radios in the system ( ). Radios in the system receive the request and do not transmit in the next control frame ( ). Group leader radios ( and ) transmit the identification code they were able to demodulate in the previous frame to the master radio ( ). The master radio ( ) receives the information from the group leaders and transmits a control-channel access message to one of the contending radios ( ).

US Patent:

6745038, Jun 1, 2004

Filed:

Apr 30, 2001

Appl. No.:

09/845467

Inventors:

Matthew R. Perkins - Sunrise FL
Qicai Shi - Tamarac FL
Neal K. Patwari - Plantation FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 720

US Classification:

4554561, 4554562, 455 412, 455 413, 455226, 370335, 370342

Abstract:

A technique for intra-piconet location determination and tomography is described. This technique uses received signal strength indicator (RSSI) values in conjunction with transmitted power levels to determine the relative location of each device within a small network employing frequency hopped spread spectrum transmission. In addition to the location determination properties of the invention, the geometry of the devices in the network, as well as the path loss information between pairs of devices, may be used to infer the location of absorbers and reflectors within the piconet. This absorption and reflection information may be used in creating the piconet tomography. The approach described in this specification may be applied in conjunction with the Bluetooth wireless Personal Area Network (PAN) specification to determine device locations, mitigate the effects of multi-path, and perform indoor location and security functions, and other application functions requiring cost-effective location determination.

US Patent:

6853445, Feb 8, 2005

Filed:

Jan 7, 2002

Appl. No.:

10/041052

Inventors:

Matthew R. Perkins - Sunrise FL, US
Tzer-Hso Lin - Sunrise FL, US
Neal K. Patwari - Ann Arbor MI, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01J001/00

US Classification:

356121

Abstract:

A device for detecting the direction of a light source. The device has a pin-hole lens that allows a collimated light beam to excite a light sensing surface behind the lens. The output from the light sensing surface is passed to a processor that determines the position of the surface that has been excited and the direction of the light source. When the position of one or more light sources is known, the device may further determine its own position. The devices may be used in a location system to provide known reference points to a network of other devices. The light sources may be modulated, in which the device can select or identify a particular light source based upon its modulation pattern.

US Patent:

6865347, Mar 8, 2005

Filed:

Jan 5, 2001

Appl. No.:

09/755707

Inventors:

Matthew R. Perkins - Sunrise FL, US
Tzer-Hso Lin - Coral Springs FL, US
Neal K. Patwari - Fort Lauderdale FL, US
Robert J. O'Dea - Fort Lauderdale FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B010/00

US Classification:

398172, 398130, 398151

Abstract:

An optically based location system and method of determining a location at a structure include a lighting infrastructure having lights at a structure. Each light is configured to illuminate and to transmit a respective relative or absolute terrestrial position through modulation of emitted light. An optical receiver is configured to detect the lights, to demodulate the position of detected lights, and to determine from the detection a position of the receiver. The receiver can have a conventional optical detector for determining a two-dimensional position of the receiver relative to a detected light, or can have a three-dimensional spot collimating lens and charged couple device optical detector for determining a three-dimensional position of the receiver relative to a detected light. The receiver and lights can be synchronized for converting a delay time into a distance measurement to calculate a distance between a light and the receiver.

US Patent:

6925064, Aug 2, 2005

Filed:

Sep 11, 2003

Appl. No.:

10/660393

Inventors:

Lance E. Hester - Plantation FL, US
Jian Huang - Coral Springs FL, US
Yan Huang - Weston FL, US
Padmaja Ramadas - Davie FL, US
Matthew R. Perkins - Sunrise FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L012/28

US Classification:

370255, 370312

Abstract:

In order to discover neighboring nodes () within a particular piconet, a first node () determines a list of all nodes () within its piconet () and then transmits to each node within the piconet, a message requiring a response. Depending upon which nodes are heard from, a list is formulated by the first node comprising those nodes neighboring the first node. In order for neighboring nodes within other piconets to “discover” the first node, the first node will also scan its environment to determine piconet identifications for other piconets, and then broadcast a “discovery” message having a piconet identification of a neighboring piconet. In a similar manner, the first node will also scan its environment to determine discovery messages transmitted by other nodes, thus determining neighboring nodes outside its piconet.

US Patent:

7064660, Jun 20, 2006

Filed:

May 14, 2002

Appl. No.:

10/145253

Inventors:

Matthew R. Perkins - Sunrise FL, US
Robert J. O'Dea - Fort Lauderdale FL, US
Mark J. Johnson - Cary IL, US
Neal K. Patwari - Ann Arbor MI, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G08B 1/08

US Classification:

34053913, 34028605, 340524, 340577, 340628, 340632, 73 232, 702 23

Abstract:

A system and method for inferring an electronic rendering () of an environment () comprises a plurality of devices ( and ), and a processing device. Each wireless device is capable of determining a distance between a neighboring wireless device. Moreover, each device is capable of performing at least one of the following: determining an environmental attribute of the environment, and determining a location of an object in the environment. The processing device gathers information determined from the plurality of devices and infers the electronic rendering of the environment based on the information gathered.

US Patent:

7343163, Mar 11, 2008

Filed:

Jun 19, 2000

Appl. No.:

09/596442

Inventors:

Matthew R. Perkins - Sunrise FL, US
Vernon A. Allen - Sunrise FL, US
Robert J. O'Dea - Fort Lauderdale FL, US
Juan C. Palacios - Plantation FL, US
Priscilla L. Chen - Sunrise FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20

US Classification:

4554521, 455519, 455 62, 455450, 455423, 370329

Abstract:

An adaptive channel access scheme allows for statistics that are collected to be used to group radio users into subgroups according to the desired statistic. The subgroups then utilize channels, separated by time or frequency, to access the communication system (). The sub-grouping of the radio users is designed to help minimize the chances of channel-access collisions from occurring.