Patent application number | Description | Published |
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20090163155 | METHODS FOR CALIBRATING A TRANSMITTER, AND RADIO TRANSMITTER - In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode. | 06-25-2009 |
20100069026 | Transmitter with Hybrid Closed Loop Power Control - Systems and method for implementing a transmitter with hybrid closed loop power control in a communication device. | 03-18-2010 |
20120276862 | METHODS FOR CALIBRATING A TRANSMITTER, AND RADIO TRANSMITTER - In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode. | 11-01-2012 |
20130029616 | Transmitter with Hybrid Closed Loop Power Control - Systems and method for implementing a transmitter with hybrid closed loop power control in a communication device. | 01-31-2013 |
Patent application number | Description | Published |
20120142289 | Circuit Arrangement and Method for Setting an Analog Output Signal - A circuit arrangement includes a signal processing unit and a regulation unit. The signal processing unit processes an input signal to form an analog output signal. The regulation unit is coupled to the signal processing unit in order to produce a digital regulation signal as a function of the analog output signal for regulation of the analog output signal. | 06-07-2012 |
20120195239 | Signal Generator for a Transmitter or a Receiver, a Transmitter and a Receiver - A signal generator for a transmitter or a receiver for transmitting or receiving RF-signals according to a given communication protocol includes an oscillator and a mismatch compensator. The oscillator is configured to provide a signal generator output signal having a signal generator output frequency and comprises a fine tuning circuit for providing a fine adjustment of the signal generator output frequency based on a fine tuning signal and a coarse tuning circuit for providing a course adjustment of the signal generator output frequency based on a coarse tuning signal. The mismatch compensator is configured to receive the signal generator output signal and compensate a frequency mismatch between a desired signal generator output frequency and the signal generator output frequency generated by the oscillator by providing the fine tuning signal for changing the state of the fine tuning circuit of the oscillator and by providing the coarse tuning signal for changing a state of the coarse tuning circuit of the oscillator. The mismatch compensator provides the coarse tuning signal during a guard period defined in the given communication protocol, during which no RF-signals are transmitted by the transmitter or no RF-signals are to be received by the receiver, such that the state of the coarse tuning circuit is changed within the guard period. | 08-02-2012 |
20130076418 | System and Method for Calibration of Timing Mismatch for Envelope Tracking Transmit Systems - One embodiment of the present invention relates to a system for calibrating of timing between an amplifier input signal and a modulated supply power. The system includes a supply modulation component, an error metric component, and a delay determiner. The supply modulation component provides the modulated supply power and the amplifier input signal according to an input signal and a set delay signal. The error metric component provides information from a transmitted amplitude signal and a received amplitude signal. The delay determiner generates timing adjustments in the form of the set delay signal from the error metric information. | 03-28-2013 |
20130226489 | DISTORTION ESTIMATION APPARATUS AND METHOD - A distortion estimation apparatus for estimating distortion includes a feedback element, a nonlinearity determiner, and a distortion simulator. The feedback element provides a feedback signal derived from a distorted output signal of the distorting element. A signal processing quality of the feedback element is lower than an associated signal property of the distorted output signal. The nonlinearity determiner receives the feedback signal and an input signal to the distorting element or a signal derived from the input signal. The nonlinearity determiner determines an estimated transmission characteristic of the distorting element by relating signal properties of the feedback signal and the input signal or the signal derived from the input signal. The distortion simulator estimates the distortion caused by the distorting element based on the input signal or the signal derived from the input signal and the estimated transmission characteristic. | 08-29-2013 |
20140133526 | CIRCUIT, TRANSCEIVER AND MOBILE COMMUNICATION DEVICE - A circuit for providing a bias signal for a power amplifier includes a first input, a second input and an output. The first input is configured to receive an input signal to be amplified by the power amplifier. The second input is configured to receive the amplified input signal. The output is configured to provide the bias signal. | 05-15-2014 |
20140185723 | Signal Delay Estimator with Absolute Delay Amount and Direction Estimation - A signal delay estimator includes an adjustable delay element for delaying a first signal to obtain a delayed first signal, a delay amount estimator for estimating a delay amount between the delayed first signal and a second signal that is similar and delayed relative to the first signal, and a leading signal determiner for determining whether the delayed first signal leads the second signal or vice versa, and for generating a corresponding binary signal. A selective inverter is provided for selectively inverting the delay amount depending on the binary signal. The signal delay estimator also includes a feedback element to the adjustable delay element for controlling a delay based on an output of the selective inverter. Another exemplary signal delay estimator includes a closed control loop with an adjustable delay element and separate first and second processing paths for absolute delay amount and delay direction, respectively. | 07-03-2014 |
20140301514 | SIGNAL DELAY ESTIMATOR WITH ABSOLUTE DELAY AMOUNT AND DIRECTION ESTIMATION - A signal delay estimator includes an adjustable delay element for delaying a first signal to obtain a delayed first signal, a delay amount estimator for estimating a delay amount between the delayed first signal and a second signal that is similar and delayed relative to the first signal, and a leading signal determiner for determining whether the delayed first signal leads the second signal or vice versa, and for generating a corresponding binary signal. A selective inverter is provided for selectively inverting the delay amount depending on the binary signal. The signal delay estimator also includes a feedback element to the adjustable delay element for controlling a delay based on an output of the selective inverter. Another exemplary signal delay estimator includes a closed control loop with an adjustable delay element and separate first and second processing paths for absolute delay amount and delay direction, respectively. | 10-09-2014 |
20150023445 | Systems and Methods Utilizing Adaptive Envelope Tracking - A communication system utilizing adaptive envelope tracking includes a transmit path, a feedback receiver, a parameter component and an envelope tracking component. The transmit path is configured to generate a transmit signal. The feedback receiver is configured to generate a feedback signal from the transmit signal. The parameter component is configured to generate linearity parameters from the feedback signal and the baseband signal. The envelope tracking component is configured to generate a supply control signal having time delay adjustments. | 01-22-2015 |