Viasat, Inc.

Arizona State University

David E Pettit

Kenneth V Buer

Dean Lawrence Cook

Ramanamurthy V Darapu

Martin Gimersky

Konrad Miehle

Bill T Agar

Lawrence T Clark

Dan Wheeler Patterson

Rahul Shringarpure

Bobby D Anderson, Ii

Xiaoyin Yao

Bobby D Andersen, Ii

Bobby D Anderson Ii

Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.

Radio frequency loopback for transceivers

The present disclosure, for example, relates to one or more techniques for linearizing a signal in a communications system. An input signal may be obtained at a beginning of a signal path of a radio frequency (RF) communication device. The RF communication device may estimate subsequent distortion of the input signal due to the signal path. The estimated distortion may include estimated phase distortion and estimated amplitude distortion of the input signal. The RF communication device may adjust phase and amplitude within the signal path to compensate for the estimated phase distortion and the estimated amplitude distortion to produce an adjusted signal. The phase within the signal path of the input signal may be adjusted separately from the amplitude within the signal path of the input signal. The RF communication device may generate a linearized signal at an end of the signal path based at least in part on the adjusted signal.

Techniques for linearizing phase independently of amplitude in a communications system

Techniques for linearizing phase separately from amplitude in a communications system

Embodiments of circuits and method for dual redundant register files with error detection and correction mechanisms are described herein. Other embodiments and related examples are also described herein.

Circuits and methods for dual redundant register files with error detection and correction mechanisms

Growing community of inventors

Gilbert, AZ, United States of America

David E Pettit