Intel Corporation

Armando Cova

Ashoke Ravi

Andreas Langer

Daniel B Schwartz

Gunther Kraut

Gregory W Chance

Christoph Hepp

Niranjan Karandikar

Mohammed Alam

Michael Milyard

John J Parkes, Jr

Dong-Jun Yang

An apparatus for a mobile communication device adapted for digital pre-distortion that includes a memory and a processor operatively coupled to the memory of the processor. The processor receives a first input signal and also receives a first output signal from a power amplifier that is based on the first input signal. The processor additionally varies compression applied to a second input signal based on the first output signal of the power amplifier, generates a distortion compensation vector for the second input signal based on the first output signal of the power amplifier, and also varies an input excitation signal supplied to the power amplifier based on the first output signal of the power amplifier.

Feedback control systems for wireless devices

A wireless communication device can include an antenna configured to sense a radio frequency (RF) signal. The wireless communication device can include signal estimation circuitry configured to generate estimates of amplitude and frequency for unmodulated spurs within the RF signal. The wireless communication device can further include multi-tone generator circuitry coupled to the signal estimation circuitry and configured to generate a composite spur cancellation signal based on the estimates of amplitude and frequency for unmodulated spurs within the RF signal. The wireless communication device can further include adder circuitry configured to subtract the spur cancellation signal from the RF signal to generate a spur cancelled signal.

Noise reduction and spur and distortion cancellation techniques

Embodiments of a mobile communication device and method for digital pre-distortion (DPD) are disclosed herein. The mobile communication device may scale a sequence of input samples by per-sample scale factors to generate a sequence of output samples for input to a power amplifier (PA), the input samples scaled to compensate for distortion of the PA. The mobile communication device may generate the scale factors based on per-sample inner products between a common weight vector and a per-sample distortion compensation vectors. The mobile communication device may generate the distortion compensation vectors based on vector outputs of predetermined distortion compensation functions. The mobile communication device may update the common weight vector based on a distortion error sequence between the sequence of output samples and a sequence of feedback samples.

Device and method of pre-distortion of power amplifier input signals

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 include applying an in-band gain to the in-band error signal to generate an adjusted in-band error signal and applying an out-of-band gain to the out-of-band error signal to generate an adjusted out-of-band error signal. The method may also include combining the compressed signal with the adjusted in-band error signal and the adjusted out-of-band error signal to generate an output signal. The compressed signal may be combined with the adjusted error signals, and the in-band gain and the out-of-band gain may be based on the output signal such that distortion of the output signal is reduced with respect to distortion of the compressed signal.

Signal peak-to-average power ratio (PAR) reduction

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Chandler, AZ, United States of America

Armando Cova