Neiyer S Correal

US Patent:

6594317, Jul 15, 2003

Filed:

Apr 8, 2002

Appl. No.:

10/029038

Inventors:

Paul E. Gorday - West Palm Beach FL
Neiyer S. Correal - Cooper City FL

Assignee:

Motorola, Inc - Schaumburg IL

International Classification:

H04L 2700

US Classification:

375259

Abstract:

A method and apparatus for encoding and decoding signals using code position modulation (CPM) in a communication system. The encoding method includes storing an N-chip pseudo-random noise sequence, such as an m-sequence, in a circular shift register and circularly shifting it to obtain a shifted m-sequence. The shifted m-sequence is compared to an m-bit symbol corresponding to the k bit information value. If the shifted m-sequence and the m-symbol match, the shifted m-sequence is output as the N-chip CPM sequence. Alternatively, the m-symbol is used as an initial condition for a pseudo-noise sequence generator. The corresponding decoder stores an N-chip m-sequence in a circular shift register and a correlates shifted version of the m-sequence with a received N-chip CPM sequence. When a peak in the correlation value is detected, an m-bit field is retrieved from the circular shift register and mapped back to a k-bit information value.

US Patent:

6748324, Jun 8, 2004

Filed:

Jan 7, 2002

Appl. No.:

10/040610

Inventors:

Neal K. Patwari - Ann Arbor MI
Vernon Anthony Allen - Fort Lauderdale FL
Neiyer S. Correal - Cooper City FL
Matthew R. Perkins - Sunrise FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01S 100

US Classification:

701300, 701207, 701214, 340988

Abstract:

A method is provided for estimating relative location information for wireless devices. Individual estimates are obtained from two or more alternative means that determining the relative location, such as range information, of first and second wireless devices with respect to each other ( ). At least one of these estimates involves an estimate of relative location between one of the first and second devices and a third device. These estimates are combined to provide a new estimate that is statistically more accurate than any one of the individual estimates ( ).

US Patent:

6996403, Feb 7, 2006

Filed:

Dec 2, 2004

Appl. No.:

11/001797

Inventors:

Qicai Shi - Coral Springs FL, US
Neiyer S. Correal - Cooper City FL, US
Jian Huang - Coral Springs FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20

US Classification:

4554561, 455 412

Abstract:

A method and apparatus for locating a remote unit (or node) is provided herein. During operation, location-finding equipment () will determine a gross location of non-located nodes () by determining distances of the nodes () to reference nodes (). Additionally an error estimate in the location for each node is determined. A first subset of nodes having relatively lower error estimates are “promoted” to reference nodes, and a second subset of nodes having higher error estimates are again located based on a distance to the newly-promoted reference nodes.

US Patent:

7092726, Aug 15, 2006

Filed:

Dec 29, 2003

Appl. No.:

10/747377

Inventors:

Qicai Shi - Coral Springs FL, US
Neiyer S. Correal - Cooper City FL, US
Paul E. Gorday - West Palm Beach FL, US
Spyros Kyperountas - Coral Springs FL, US
Feng Niu - Weston FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20

US Classification:

4554566, 455 412, 342451, 342463

Abstract:

A method and system is provided for determining a location for each of a plurality of units, which is selected from one of multiple sets of locations, which are each estimated based upon different initial location estimates. The selected set of locations includes the set which has the minimum error value, where the error value is based on the aggregate of the differences between the range determined from the estimated locations and the measured range. By using different sets of initial location estimates, there is a greater chance that at least one of the sets of initial location estimates will avoid any local minimums and produce a more accurate estimate of unit locations.

US Patent:

7242947, Jul 10, 2007

Filed:

Dec 23, 2003

Appl. No.:

10/743961

Inventors:

Feng Niu - Weston FL, US
Spyros Kyperountas - Coral Springs FL, US
Frederick L. Martin - Plantation FL, US
Jian Huang - Coral Springs FL, US
Qicai Shi - Coral Springs FL, US
Timothy Bancroft - Boca Raton FL, US
Neiyer S. Correal - Cooper City FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20

US Classification:

4554561, 455 412, 455457, 4554042

Abstract:

A method and location determination module is provided for determining a location of one of a plurality of units using neighbor lists. Each unit is communicatively coupled to at least some of the other plurality of units, where at least some of the plurality of units are reference units, whose locations are known. The units communicate with other nearby units within communication range, to establish neighbor lists. A unit to be located then identifies an aggregate value corresponding to the number of occurrences of the reference units in the neighbor list of the unit to be located and the neighbor lists of each of a group of associated units. The location of the unit to be located is then determined, based upon the known locations of the reference units and the number of identified occurrences of the reference units in the corresponding neighbor lists.

US Patent:

7274940, Sep 25, 2007

Filed:

Dec 29, 2003

Appl. No.:

10/747378

Inventors:

Spyros Kyperountas - Coral Springs FL, US
Oleg Andric - West Palm Beach FL, US
Neiyer S. Correal - Cooper City FL, US
Jian Huang - Coral Springs FL, US
Feng Niu - Weston FL, US
Qicai Shi - Coral Springs FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20

US Classification:

4554561

Abstract:

A method and system is provided for determining a location for each of a plurality of units, which are sub-divided into more than one sub-net groupings, that each include two or more units. Within each sub-net grouping, measured range information between units within the sub-nets and one or more reference units is gathered in at least a selected one of the units. The selected one of the units then estimates a location for each of the units, which minimizes any error in the measured ranges between the units in each of the corresponding sub-nets.

US Patent:

7353031, Apr 1, 2008

Filed:

Jun 8, 2005

Appl. No.:

11/147869

Inventors:

Qicai Shi - Coral Springs FL, US
Neiyer S. Correal - Cooper City FL, US
Jian Huang - Coral Springs FL, US
Spyros Kyperountas - Weston FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20

US Classification:

4554561, 4554042, 455440, 455443, 455444

Abstract:

A method for estimating the location of a blindfolded node () in a wireless network having reference nodes () is provided. The reference nodes () are combined into pairs () and each pair is checked to determine if the reference nodes are within each other's communication rage (). A plurality of probable regions () for the blindfolded node are obtained (). These probable regions are overlapped (), and the blindfolded node's estimated location is estimated to be the geometric center of the overlapped regions ().

US Patent:

7548517, Jun 16, 2009

Filed:

Apr 25, 2005

Appl. No.:

11/113637

Inventors:

Spyros Kyperountas - Weston FL, US
Neiyer S. Correal - Cooper City FL, US
Feng Niu - Weston FL, US
Qicai Shi - Coral Springs FL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01R 31/08

US Classification:

370252, 342453, 342458

Abstract:

A location technique is utilized where channel-model parameters are originally estimated prior to location taking place. Location then takes place using a first set of known-located nodes, and the channel-model parameters are updated based on the distances resulting from the location estimate. Once the channel-model parameters have been updated, location again takes place using a second set of known-located nodes, node distances are calculated based on the produced locations and the channel-model parameters are again updated. This process continues until no significant change is observed between the previous and the newly estimated location, or until a maximum number of iterations is reached.