Christopher P Larosa

7031271, Apr 18, 2006

May 19, 1999

09/314819

Christopher Peter LaRosa - Lake Zurich IL, US
Brian David Storm - Round Lake Beach IL, US
Michael John Carney - Woodstock IL, US
Tracie Ann Schirtzinger - Woodstock IL, US

Motorola, Inc. - Schaumburg IL

H04Q 7/00
G08C 7/00

370311, 370342, 370441, 375136

A method of activating a radiotelephone operable in a spread-spectrum multiple access radiotelephone system. A searcher receiver () is activated, and the searcher receiver () acquires a PN sequence timing of a pilot signal. At least one demodulation branch () is activated after activation of the searcher receiver (), and the demodulation branch synchronizes to the PN sequence timing of the selected pilot signal after the searcher receiver () has acquired the PN sequence timing.

7068708, Jun 27, 2006

Dec 13, 2002

10/319014

Christopher LaRosa - Crystal Lake IL, US
Tracie Schitzinger - Fontana WI, US
David Steckl - Elkhorn WI, US

Motorola, Inc. - Schaumburg IL

H04B 1/69
H04B 1/707
H04B 1/713

375148, 375144, 375150, 375142

A method () and a receiving unit () for demodulating a multi-path signal are described herein. The receiving unit () may be configured to receive the multi-path signal. The receiving unit () may include an input buffer controller (), an input buffer (), a rake finger (), and a sum generator (). The input buffer () may be configured to store data samples associated with a plurality of paths of the multi-path signal. The input buffer controller () may be configured to time-align the data samples relative to each other, and to delay the data samples. The rake finger () may be configured to de-spread and to accumulate the delayed data samples for a sub-correlation length. The sum generator () may be configured to combine a plurality of outputs from the rake finger (). Each of the plurality of outputs corresponds to one of the plurality of paths of the multi-path signal.

7085246, Aug 1, 2006

Apr 25, 2000

09/558121

Christopher Peter LaRosa - Lake Zurich IL, US
Brian David Storm - Round Lake Beach IL, US
Michael John Carney - Woodstock IL, US
Christopher Becker - Palatine IL, US
Tracie Ann Schirtzinger - Woodstock IL, US
Dave Steckl - Elkhorn WI, US

Motorola, Inc. - Schaumburg IL

G08C 7/00
H04Q 7/38

370311, 370335, 370441

An apparatus for acquiring a pseudo-random (PN) sequence timing for a code division multiple access (CDMA) radiotelephone. A buffer stores samples of representations of at least one pilot signal. A correlator coupled to the buffer is operable to correlate at least a portion of the samples with a PN sequence at each of a plurality of different PN offsets to produce corresponding correlation energies. A controller coupled to the correlator interrupts the correlator as soon as the PN sequence at a particular PN offset produces a correlation energy at least equal to an energy threshold.

7428262, Sep 23, 2008

Aug 13, 2003

10/640487

Bryan W. Zancho - McHenry IL, US
Christopher P. Larosa - Crystal Lake IL, US
Alexandre Mallette - Chicago IL, US
John P. Oliver - Chicago IL, US

Motorola, Inc. - Schaumburg IL

H04B 1/707

375148, 375130, 375144, 375142, 375150, 375316, 455307, 455266, 455130, 455339, 455136, 702149, 702249

A method and apparatus for channel estimation in a rake receiver of a CDMA communication system operates with a finite-impulse-response channel estimation filter with L taps and having a fixed delay. A pilot sequence of a received sequence of data from a channel of the communication system on the rake receiver is input. A quality of the channel of the communication system is determined using noise or Doppler measurements. These measurements are used in adjusting a bandwidth of the filter to accommodate the channel quality while keeping the fixed delay, which minimizes the delay buffer size. The filter is then used to operate on the received sequence of data to provide coherent modulation.

7907671, Mar 15, 2011

Dec 3, 2004

11/003247

Armin W. Klomsdorf - Libertyville IL, US
Michael J. Carney - Libertyville IL, US
Christopher P. LaRosa - Crystal Lake IL, US
Dale G. Schwent - Schaumburg IL, US
Robert S. Trocke - Caledonia WI, US

Motorola Mobility, Inc. - Libertyville IL

H04K 1/10

375260

A communication unit is provided having a transmitter and a processor (). The processor () receives information () representative of a configuration of physical channels (). The processor () determines a scaling factor responsive to the information () and facilitates scaling a signal () provided by a combination of the channels utilizing the scaling factor. The scaled signal () is provided to the transmitter.

20050249274, Nov 10, 2005

May 10, 2004

10/842657

Christopher Larosa - Crystal Lake IL, US
Michael Carney - Libertyville IL, US
Chris Quanbeck - Arlington Heights IL, US

H03H007/40

375232000

An apparatus () and a method () suitable for use in a communication device by equalizing an input signal received to mitigate multipath distortion effects present in the input signal in the communication device are provided. A first filter () samples the input signal () and generates a first filter output () based upon the sampled input signal and a filter coefficient array (). An error signal () is then generated based upon a difference between the first filter output () and a desired signal (), and the filter coefficient array () is updated based upon a product of the error signal () and an adaptation constant (). A second filter () samples a delayed input signal () and generates a second filter output () based upon the sampled delayed input signal and the filter coefficient array ().

20130156018, Jun 20, 2013

Dec 15, 2011

13/326550

Yun H. Kim - Bartlett IL, US
Christopher P. Larosa - Crystal Lake IL, US
Bryan S. Nollett - Fox River Grove IL, US

MOTOROLA MOBILITY, INC. - Libertyville IL

H04W 92/00

370338

A method that implements a timing advance for an uplink communication from a user equipment (UE) comprises: selecting at least one subframe; reducing a duration of at least one selected symbol of each of the at least one subframe to generate at least one reduced duration subframe; replacing a remaining portion of payload data of each of the at least one selected symbol with a pre-selected replacement value; by-passing each of the at least one selected symbol during pre-transmission processing of the at least one reduced duration subframe; processing any remaining symbols of the at least one reduced duration subframe, such that a processing time of the remaining symbols of the at least one reduced duration subframe is reduced by at least the value of the timing advance; and transmitting the at least one reduced duration subframe via the uplink communication to the base station.

52895050, Feb 22, 1994

Dec 13, 1991

7/806511

Christopher P. LaRosa - Lake Zurich IL
Michael J. Carney - Palatine IL

Motorola, Inc. - Schaumburg IL

H04L 2722

375 83

The present patent application discusses a frequency translation apparatus for altering the effective frequency of the phase information of an input signal (115). The input signal (115) has a first phase (. theta. (t)) and a first frequency (f. sub. i). The phase of the input signal is extracted and digitized at a second frequency (f. sub. o), forming a second N-bit digital phase signal (. theta. '(t))(311). The frequency translation apparatus generates a third digital phase signal (319) which approximates the difference between. theta. (t) and. theta. '(t). Then, the frequency translation apparatus combines the second digital phase signal and the third digital phase signal, forming a fourth digital phase signal (307) substantially approximating the first phase signal.