1
Charles Brian Cox, David Kent Bonds, Jay Jui Chieh Chen, Flaviu C Costescu, Joel Richard Dierks, Wayne Douglas Duello, Thomas L Frederick, Paul A Goud, Derek Stephen Hilborn, Richard Johnathan Hinkle, Terry Lee Hinkle, David E Jones, Theron Lee Jones, Patricia Fern Kavanagh, David W Kroeger, Robert Richard Leyendecker, Vladimir Pavlovic, Claudio Gustavo Rey, Ray M R Sewlochan, Emre Tapucu, Mark A Walker: Linear transmitter using predistortion. Glenayre Electronics, Christensen O Connor Johnson & Kindness PLLC, March 24, 1998: US05732333 (236 worldwide citation)

A linear transmitter (101) using predistortion includes a modulator (103), a predistorter (107), a digital quadrature modulator (111), an upconverter (113), a power amplifier (115), and an antenna (117). In addition, the transmitter (101) has a feedback loop including a coupler (119), a downconverte ...


2
Robert Richard Leyendecker, Jay Jui Chieh Chen, Armando Cova Garrido, Yan Guo, Vladimir Pavlovic, Claudio Gustavo Rey, Desmond Wai Ming Yan: Method and apparatus for linear transmission by direct inverse modeling. Glenayre Electronics, Christensen O Connor Johnson & Kindness PLLC, July 13, 1999: US05923712 (61 worldwide citation)

A system for linearly transmitting an amplified output signal using predistortion whereby a straight inverse modeling scheme is used to more easily and accurately determine the inverse of the distortion caused by a power amplifier of a RF transmitter. The "inverse" of the power amplifier is directly ...


3
Claudio Gustavo Rey, Ognjen B Katic: Forward-backward channel interpolator. Glenayre Electronics, Christensen O&apos Connor Johnson Kindness PLLC, January 9, 2001: US06173011 (28 worldwide citation)

An interpolator having a linear phase response has a first stage implemented with an IIR filter to achieve the narrow transition bandwidth with relatively few filter coefficients. Zero-stuffing and filtering are used to achieve the interpolation. A forward-backward filtering methodology is then used ...


4
Claudio Gustavo Rey, Jonathan Robert Gay, William Michael Lye, Ognjen Katic, Terence K W Lau, Jatinder Singh Chana: Joint equalization and timing acquisition for RZ signals. PMC Sierra, Oyen Wiggs Green & Mutala, April 4, 2006: US07023941 (22 worldwide citation)

An apparatus and method for jointly equalizing a return to zero (RZ) signal and detecting timing errors in the RZ signal, using values or indices from equalizer taps, including a set reference tap that does not shift. A timing error detector detects a timing error based on a group delay measured fro ...


5
Marlo Rene Gothe, Nino Pietro Ferrario, Claudio Gustavo Rey, Ognjen Katic: Physical channel estimator. Glenayre Electronics, Christensen O&apos Connor Johnson Kindness PLLC, July 31, 2001: US06269131 (15 worldwide citation)

A physical channel estimator for a communication system using pilot symbols and an equalizer uses a model of the system in which the impulse response of the physical channel is considered separately from the impulse responses of the pulse shaping filters in the transmitter and receiver of the commun ...


6
Claudio Gustavo Rey: Cascaded jitter frequency shifting Δ-Σ modulated signal synchronization mapper. PMC Sierra, Oyen Wiggs Green & Mutala, November 20, 2007: US07298808 (10 worldwide citation)

The invention provides a synchronizer incorporating a Δ-Σ modulator (i.e. a bit stuffing command generator), coupled in series with a frequency offset measurement block and a frequency-locked loop, to synchronize the data rate of an output data stream to that of an input data stream such that jitter ...


7
Marlo Rene Gothe, Claudio Gustavo Rey: Header synchronization detector. Glenayre Electronics, Christensen O Connor Johnson & Kindness PLLC, April 11, 2000: US06049577 (10 worldwide citation)

A pattern detector adapted for wireless communication systems includes an error calculator, a comb filter, an averager, and a threshold detector. The pattern to be detected is a sequence of pilot signal patterns whose error calculation is relatively invariant with respect to frequency offset introdu ...


8
Ognjen Katic, Claudio Gustavo Rey: Equalizer and equalization method for return-to-zero signals. PMC Sierra, Oyen Wiggs Green & Mutala, December 26, 2006: US07154946 (5 worldwide citation)

An equalizer for return-to-zero (RZ) signals comprises: (a) an equalizer core for equalizing the received signal; (b) a decision corrector for detecting and correcting misplaced pulses and double pulses in the equalized signal using known characteristics and properties of the RZ signal itself; and ( ...



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