Apple Inc.

Motorola Mobility LLC

Google Inc.

Ryan Joseph Goedken

Armin Werner Klomsdorf

Dale Gerard Schwent

Thomas D Nagode

Gregory Redmond Black

Nicholas W Lum

Xueting Liu

Berke Cetinoneri

Lawrence R Schumacher

Ioannis Sarkas

Ernie Schirmann

Evan M Manrique

An electronic device may include wireless communications circuitry, control circuitry, and sensor circuitry. The wireless communications circuitry may include amplifier circuitry that amplifies radio-frequency signals using on a bias voltage to generate amplified radio-frequency signals transmitted over an antenna. Power supply circuitry may generate the bias voltage based on an envelope mapping setting and an envelope signal associated with the radio-frequency signals. The sensor circuitry may generate sensor data that characterizes the performance of the wireless communications circuitry and provide the sensor data to the control circuitry. The control circuitry may use the provided sensor data to generate control signals for the power supply circuitry. The control signals may adjust the envelope mapping setting of the power supply circuitry.

Wireless communications systems with envelope tracking capabilities

Systems and method to improve performance of a radio frequency system while operating in compliance with wireless transmission regulations are provided. One embodiment describes a radio frequency system including an antenna that wirelessly transmits an analog electrical signal at a transmission frequency and receives a first network signaling value from a wireless network. The radio frequency system further includes a controller that determines operational constraints on the radio frequency system based on a region of operation; determines a second network signaling value based on the operational constraints, in which the second network signaling value overrides the first network signaling value; determines operational parameters based on the second network signaling value; and instructs the radio frequency system to implement the operational parameters to facilitate the radio frequency system operating in compliance with the operational constraints.

Radio frequency systems and methods for overriding network signaling values

Systems and method for improving performance of a radio frequency system are provided. One embodiment describes a radio frequency system, which includes an antenna that wirelessly transmits analog electrical signals at a desired transmission frequency; a feedback receiver that determines a feedback signal, which includes a portion of a transmitted analog electrical signal via a coupler; and a controller that determines location and magnitude of spurious emissions transmitted at frequencies other than the desired transmission frequency by comparing the feedback signal with a desired signal, in which the desired signal includes a digital electrical signal that does not contain noise introduced by the radio frequency system; and instructs the radio frequency system to adjust operational parameters used to transmit the analog electrical signals when the magnitude of the spurious emissions exceeds a spurious emissions limit at the determined location.

Radio frequency systems and methods for controlling spurious emissions

A wireless communication entity schedulable in a wireless communication network, including a controller () communicably coupled to a power amplifier (), wherein the controller varies a spectrum emissions level of the wireless communication entity based on the radio resource assignment information receiver by the radio receiver, such as whether NS signaling is active. Examples of NS signaling include sending an NS_07 signaling flag for bandsignaling or one of a NS_12-15 signaling flag for band

Spectrum emission level variation in schedulable wireless communication terminal

A communication device reduces intermodulation interference in a simultaneous transmitter using a notch diplexing arrangement. The communication device has a radio front-end module with more than one transceiver for simultaneous transmission with opposing transmit (Tx) band notch filters in series with each duplexer output, and phase rotations into and out of the notch filters suitable for diplexing at the notch filter outputs.

Communication device for simultaneous transmission by multiple transceivers

A method () and apparatus () optimize resource block based transmitter operation in a wireless communication device. The method can include receiving () a radio resource assignment including a particular resource block allocation. The method can include configuring () a wireless communication transceiver for the particular resource block allocation. The method can include degrading () power amplifier distortion of the wireless communication transceiver based on the particular resource block allocation. The power amplifier distortion can be a measure of a deviation of the power amplifier output in an analysis domain from an ideal linear amplifier.

Method and apparatus for resource block based transmitter optimization in wireless communication devices

A wireless communication system () for power amplification of an input signal includes a power amplifier () operable to amplify a data signal (). An envelope generatoror detector is operable to determine an envelope signal () from the data signal. A tracking power supply or other power supply control circuit () is operable to control a supply voltage of the power amplifier with the envelope signal. An allocation manager () is operable to determine a resource block allocation within a channel for the data signal. A delay circuit () is operable to insert a delay () between the envelope signal and the data signal as a function of the resource block allocation within the channel, thereby intentionally causing unbalanced leakage about the resource block allocation. Increased leakage on one side of the allocation results in improved leakage on the other side.

Method and apparatus for improving efficiency and distortion leakage in a wireless power amplifier

A method and system controls a transition between utilizing an envelope tracking (ET) mechanism and using an average power tracking (APT) mechanism to provide power to a power amplifier. A power amplifier controller (PAC) initiates an ET mechanism to track changes in amplitudes of a radio frequency (RF) signal being received by the power amplifier. If the PAC determines that the RF signal bandwidth is low and the average amplitude is at least equal to a threshold value, the PAC maintains the ET mechanism. If the RF signal bandwidth is high and/or the average amplitude of the RF signal is less than the threshold value, the PAC temporarily deactivates the ET mechanism and controls a transition to utilizing the APT mechanism by properly synchronizing the transition to the change in average signal amplitude levels so there are no undesired transients affecting signal quality or spectrum.

Supply transitions in an envelope tracked power amplifier

A method and apparatus for an adjustable filter system comprises a first integrated circuit generating a reference value that represents a corner frequency of a filter within the first integrated circuit; sending the reference value that represents the corner frequency of the filter across an interface to a second integrated circuit; receiving, across the interface from the second integrated circuit, a filter adjustment value; and changing the corner frequency of the filter using the filter adjustment value to adjust a passband and a stopband of the filter. The apparatus and method also comprises a second integrated circuit detecting a filter adjustment event, wherein the filter adjustment event comprises receipt of the reference value; calculating the filter adjustment value to change a corner frequency of the filter within a first integrated circuit; and sending the filter adjustment value across the interface to the first integrated circuit.

Method and apparatus for controlling or managing bandwidth of a filter circuit within a system having two integrated circuits

A method and system mitigates receiver desensitization caused by a reverse inter-modulation distortion (IMD) signal generated by a power amplifier associated with one of at least two concurrently operating transmitters. A power amplifier controller (PAC) determines whether at least one power amplifier operating in a first operating state generates a reverse IMD signal that can substantially interfere with at least one receive channel due to a concurrent operation of at least two concurrently operating transmitters. In response to determining that at least one power amplifier generates the reverse IMD signal when in the first operating state, the PAC initiates a second operating state of the power amplifier to increase the linearity of the at least one power amplifier in order to reduce the reverse IMD signal. The PAC initiates the second operating state by adjusting parameters of the power amplifier.

Growing community of inventors

Santa Clara, CA, United States of America

Ryan Joseph Goedken