1
Armando Cova: Predistortion in a linear transmitter using orthogonal kernels. Glenayre Electronics, Christensen O Connor Johnson Kindness PLLC, October 31, 2000: US06141390 (170 worldwide citation)

A system for linearly transmitting an amplified output signal using predistortion is disclosed. The system uses a straight inverse modeling scheme with orthogonal predictor variables to more easily and accurately determine the inverse of the distortion caused by a power amplifier of a RF transmitter ...


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 (59 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
Armando Cova Garrido: Model-based adaptive feedforward amplifier linearizer. Glenayre Electronics, Christensen O Connor Johnson & Kindness PLLC, September 28, 1999: US05959500 (49 worldwide citation)

A linear RF transmitter uses an adaptive forward model of the power amplifier in a feedforward linearization system. The forward model outputs a modeled power amplifier output signal, which is then used to calculate the error signal. The error signal represents the distortion caused by the power amp ...


4
Armando Cova, Scott Carichner: Wideband enhanced digital injection predistortion system and method. Powerwave Technologies, Myers Dawes Andras & Sherman, April 29, 2008: US07366252 (12 worldwide citation)

A system for linearizing RF amplifiers employing baseband predistortion techniques provides additive or multiplicative predistortion of the quadrature (I/Q) input signal. The predistorter uses a discrete-time polynomial kernel to model the inverse transfer characteristic of the amplifier, providing ...


5
Armando Cova: Digital predistortion system and method for high efficiency transmitters. Powerwave Technologies, Myers Dawes Andras & Sherman, February 26, 2008: US07336725 (6 worldwide citation)

A system for digitally linearizing the nonlinear behaviour of RF high efficiency amplifiers employing baseband predistortion techniques is disclosed. The system provides additive or multiplicative predistortion of the digital quadrature (I/Q) input signal in order to minimize distortion at the outpu ...


6
Armando Cova: Signal peak-to-average power ratio (PAR) reduction. Intel IP Corporation, Baker Botts L, October 6, 2015: US09154168

A method of reducing a peak to average power ratio (PAR) of a signal may include generating an in-band error signal indicating in-band distortion of a compressed signal and generating an out-of-band error signal indicating out-of-band distortion of the compressed signal. The method may further inclu ...


7
Armando Cova: Digital predistortion system and method for high efficiency transmitters. Myers Dawes Andras & Sherman, September 8, 2005: US20050195919-A1

A system for digitally linearizing the nonlinear behaviour of RF high efficiency amplifiers employing baseband predistortion techniques is disclosed. The system provides additive or multiplicative predistortion of the digital quadrature (I/Q) input signal in order to minimize distortion at the outpu ...


8
Armando Cova, Scott Carichner: Wideband enhanced digital injection predistortion system and method. Myers Dawes Andras & Sherman, July 21, 2005: US20050157814-A1

A system for digitally linearizing the nonlinear behaviour of RF high efficiency amplifiers employing baseband predistortion techniques is disclosed. The system provides additive or multiplicative predistortion of the digital quadrature (I/Q) input signal in order to minimize distortion at the outpu ...



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