Wayne A Bradley

US Patent:

6483885, Nov 19, 2002

Filed:

Sep 3, 1999

Appl. No.:

09/390007

Inventors:

Wayne H. Bradley - West Chicago IL
James L. Porter - Oklahoma City OK

Assignee:

PrairieComm, Inc. - Arlington Heights IL

International Classification:

H04L 700

US Classification:

375366

Abstract:

A frame synchronizer for use in a receiver that receives an encoded signal from a transmitter includes a conjugation unit, a delay unit and multiplier coupled together to process the encoded signal. The multiplier multiplies either the received encoded signal by a conjugated, delayed version of the received encoded signal or multiplies a conjugated version of the received encoded signal by a delayed version of the received encoded signal to produce a first product signal. A further multiplier multiplies the first product signal with a locally-stored signal to generate a second product signal. An accumulator accumulates the second product signal over a plurality of bit times to generate an accumulated signal having a magnitude representing a time synchronization offset between the receiver and the transmitter and phase representing a frequency synchronization offset between the receiver and the transmitter. A synchronization correction unit generates a time offset correction and a frequency offset correction from the accumulated signal and these corrections are used to correct offsets between the receiver and the transmitter.

US Patent:

6738420, May 18, 2004

Filed:

Jul 24, 2000

Appl. No.:

09/624684

Inventors:

Wayne H. Bradley - West Chicago IL

Assignee:

PrairieComm, Inc. - Rolling Meadows IL

International Classification:

H03H 730

US Classification:

375234, 375236, 375219, 375354

Abstract:

A digital filter includes a number of coefficient generators that are clocked by a clock having a frequency including an undesired component. The coefficient generators, which each have a number of states, are communicatively coupled to multipliers that receive incoming signals and multiply the incoming signals by coefficients produced by the coefficient generators. Based on the magnitude of the undesired coefficient, certain states of the coefficient generators may be repeated or skipped to adjust the time and frequency domain of the output from the digital filter.

US Patent:

6804501, Oct 12, 2004

Filed:

Sep 25, 2000

Appl. No.:

09/669015

Inventors:

Wayne H. Bradley - West Chicago IL
John W. Diehl - Elmhurst IL

Assignee:

PrairieComm, Inc. - Rolling Meadows IL

International Classification:

H04B 1702

US Classification:

455138, 4552411, 4552452, 4552511

Abstract:

A receiver generates two metrics, one that is used to control the gain of an amplifier and the other that is used to determine the presence of narrowband interference, such as IMD. The two metrics may represent analog-to-digital converter (A/D) saturation and average signal strength, either of which may be used to control gain or to detect the presence of narrowband interference.

US Patent:

6810078, Oct 26, 2004

Filed:

Dec 8, 2000

Appl. No.:

09/733670

Inventors:

Wayne H. Bradley - West Chicago IL

Assignee:

Prairiecomm, Inc. - Rolling Meadows IL

International Classification:

H03M 1300

US Classification:

375225, 714774, 714780, 714795, 714789, 375341, 375262

Abstract:

A blind rate determination system generates syndromes for a received symbol stream and, based on the syndromes, calculates a confidence metric associated with possible data rates. The confidence metrics are compared to one another and to a threshold and the data rate associated with the best confidence metric is selected as the data rate at which the symbol stream was encoded.

US Patent:

6996158, Feb 7, 2006

Filed:

Feb 22, 2001

Appl. No.:

09/791950

Inventors:

Wayne H. Bradley - West Chicago IL, US

Assignee:

Freescale Semiconductors, Inc. - Austin TX

International Classification:

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

US Classification:

375148, 375150

Abstract:

A code division multiple access (CDMA) receiver detects the presence of differently formatted signals (e. g. , global system for mobile communications (GSM) signals) by programming a CDMA searcher co-processor, which includes a digital filter, with tap weights that correlate with a known sequence within the differently formatted signals. If the tap weights correlate to a received signal, the receiver produces an indication that a differently formatted signal is present. Once differently formatted signals are detected, specific hardware and/or software may be implemented to receive and process the differently formatted signals.

US Patent:

7016398, Mar 21, 2006

Filed:

Jun 15, 2001

Appl. No.:

09/882190

Inventors:

Wayne H. Bradley - West Chicago IL, US

Assignee:

Freescale Semiconductor, Inc. - Austin TX

International Classification:

H04B 1/69
H04B 1/707

US Classification:

375147, 375150

Abstract:

A code division multiple access (CDMA) receiver detects, de-scrambles, and de-spreads multiple channels that utilize different binary codes. The processing that is common to all channels can be performed once thus saving gate count and power consumption.

US Patent:

7313166, Dec 25, 2007

Filed:

Jan 20, 2006

Appl. No.:

11/336500

Inventors:

Wayne H. Bradley - West Chicago IL, US

Assignee:

Freescale Semiconductor, Inc - Austin TX

International Classification:

H04B 1/69
H04B 1/707

US Classification:

375147, 375150

Abstract:

A code division multiple access (CDMA) receiver detects, de-scrambles, and de-spreads multiple channels that utilize different binary codes. The processing that is common to all channels can be performed once thus saving gate count and power consumption.

US Patent:

20050111529, May 26, 2005

Filed:

Oct 28, 2004

Appl. No.:

10/904196

Inventors:

Wayne Bradley - West Chicago IL, US

Assignee:

PRAIRIECOMM, INC. - Rolling Meadows IL

International Classification:

H04B001/69

US Classification:

375148000

Abstract:

A code division multiple access (CDMA) receiver can detect the presence of a GSM tone-based signal by programming the digital filter's tap weights to correlate with a GSM FCCH signal. If the correlation between the values of the tap weights and a received signal satisfies a threshold, the receiver produces an indication that a GSM signal is present. Post-processing can be performed on the output of the digital filter to improve signal detection based on the determination of the correlation of the received signal with the digital filter, the determination of the corresponding power value, the determination of the signal strength; and the estimation of the frequency offset.