Paul P Petrus, 543574 Olsen Dr, San Jose, CA 95117

6441784, Aug 27, 2002

Jun 30, 2000

09/608835

Oronzo Dino Flore - Santa Clara CA
Paul Petrus - Santa Clara CA

ArrayComm, Inc. - San Jose CA

H01Q 300

342377

A method and apparatus for predicting uplink and/or downlink beamforming in a wireless communication system employing an antenna array. The method and apparatus may predict uplink and/or downlink weights as a function of previous uplink and/or downlink weights. An interpolation of a sample of uplink weights and/or downlink weights is used to predict a future uplink or downlink weight.

6650714, Nov 18, 2003

Apr 24, 2001

09/841456

Mithat C. Dogan - Sunnyvale CA
Paul Petrus - Santa Clara CA
Mitchell D. Trott - Mountain View CA

ArrayComm, Inc. - San Jose CA

H04L 2706

375343, 375267, 375347, 375354

A method and apparatus are provided that performs spatial processing, timing estimation and frequency offset using a training sequence of a received burst. According to one aspect of the present invention, the invention includes receiving a burst having a known training sequence at a set of diversity antennas, sampling the received burst at each antenna, determining a coarse timing estimate for samples from at least one antenna, and determining a spatial weighting vector using the coarse timing estimate. The embodiment further includes applying the spatial weighting vector to the received burst samples for each antenna to form a single channel signal, determining a fine timing estimate for the single channel signal, determining a second spatial weighting vector using the fine timing estimate, applying the second spatial weighting vector to the received burst samples for each antenna to form a second single channel signal, and demodulating the second single channel signal.

6690747, Feb 10, 2004

Jun 6, 2001

09/877807

Paul Petrus - Sunnyvale CA
Alain M. Chiodini - Mountain View CA
Mitchell D Trott - Mountain View CA
David M. Parish - Los Altos CA
Michael Youssefmir - Palo Alto CA
Dov Rosenfeld - Oakland CA

ArrayComm, Inc. - San Jose CA

H04L 2714

375324, 375326, 370310, 343893

A method for generating a reference signal from a modulated signal transmitted to a communications station that includes an array of antenna elements and spatial processing means including: separating from the signals received at the antenna elements a copy signal corresponding to the signal transmitted by a particular remote station using an initial spatial weight vector corresponding to the particular remote station; determining from the terminal copy signal a reference signal having substantially the same frequency offset and time alignment as the received antenna signals; and computing a new spatial weight vector by optimizing a cost function, the cost function using the received antenna signals and the reference signal. For demodulation, the method further includes extracting the symbols of the modulated signal.

6839573, Jan 4, 2005

Oct 31, 2000

09/704393

Michael Youssefmir - Palo Alto CA, US
Mitchell D. Trott - Mountain View CA, US
Paul Petrus - Sunnyvale CA, US

ArrayComm, Inc. - San Jose CA

H04M 100

4555621, 4551141

An apparatus and method for adaptively producing transmitted signals and processing received signals in a communication system which includes smart antenna array of antenna elements. When processing received signals, the invention modifies an existing processing scheme by incorporating information about a second set of signals for which training or other characteristic information such as a reference is unknown to information about a first set of signals for which characteristic information such as a reference is known, prior to executing the processing scheme. This approach can be used to modify the receive weights which determine the relative weight assigned to the signals received from each of a plurality of antenna elements to take into account the presence of a changing interference environment. This permits an adaptive updating of the receive weights based on the additional information provided by the second set of data, and may be accomplished faster and with less computational resources than required to determine the weights based on applying the entire processing scheme to the second set of data. In addition, assuming a relationship between the transmit and receive environment, the invention can also be used to modify the transmit weights used by the base station.

6839574, Jan 4, 2005

Dec 20, 2000

09/745343

Paul Petrus - Santa Clara CA, US
Antoine Chemali - San Francisco CA, US
David Depierre - Paris, FR
Louis C. Yun - Santa Clara CA, US

ArrayComm, Inc. - San Jose CA

H04B 138
H04M 100

4555621, 4552772, 4552781, 455 6711

A downlink beamforming apparatus and method. In one embodiment, a method in accordance with the teachings of the present invention includes receiving uplink communication signals from a plurality of antenna array elements, selecting an operating condition of an environment and estimating downlink beamforming weights used in downlink communication signals in response to the selected operation condition of the environment.

6954643, Oct 11, 2005

Jun 25, 2003

10/606428

Paul Petrus - Santa Clara CA, US

ArrayComm LLC - San Jose CA

H04Q007/20
H04Q007/00
G01S003/02

455437, 455524, 455436, 455456, 370332, 342457

The present invention provides method and apparatus for facilitating base station selection/handover by a user terminal in a distributed (e. g. , cellular-type) wireless communication system. In accordance with one aspect, hysteresis is adaptively determined as a function of the variance of receive signal strength fluctuations. In turn, an adaptive hysteresis factor can be obtained and used for a subsequent handover decision, for example, based on a cost function that takes into account the hysteresis. In accordance with another aspect, base station selection depends on a number of criteria, such as received signal strength, base station load, and estimated distance between a receiving user terminal and one or more base stations.

7035358, Apr 25, 2006

Feb 23, 2001

09/792002

Sundar G. Sankaran - Redwood City CA, US
Paul Petrus - Santa Clara CA, US

ArrayComm, Inc. - San Jose CA

H04L 27/06

375344, 375346, 375285, 375229

Payload reconstructing methods and apparatuses from wideband signals in the presence of multipath channel imperfections and frequency offset are disclosed. In one embodiment, a method in accordance with the teachings of the present invention includes receiving a signal, estimating a frequency offset of the received signal, performing frequency offset compensation on the received signal in response to the estimated frequency offset, performing equalization compensation on the received signal in response to the frequency offset compensated signal, and outputting payload information included in the received signal in response to the equalized frequency compensated received signal.

7257101, Aug 14, 2007

Sep 30, 2002

10/262316

Paul Petrus - Santa Clara CA, US
Sundar G. Sankaran - San Jose CA, US

Arraycomm, LLC - San Jose CA

H04Q 7/00

370332, 370252, 455522

According to an embodiment of the invention, a method and apparatus are described to receive a signal, determine a quality of the received signal, and transmit a power control message, with a selected size, the power control message being based at least in part on the quality of the received signal. The power control message requests a modification in transmission power or indicates the deviation of the signal quality from a reference signal quality.