Radio frequency systems and methods for overriding network signaling values

Patent metadata

Field	Value
Publication number	US-2017347273-A1
Application number	US-201715680049-A
Country	US
Kind code	A1
Filing date	Aug 17, 2017
Priority date	Aug 3, 2015
Publication date	Nov 30, 2017
Grant date	—

Abstract

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.

First claim

What is claimed is:

1 . An electronic device comprising:
an antenna configured to wirelessly transmit a first analog electrical signal from the electronic device; and a controller configured to, when the electronic device is instructed to operate in accordance with a first network signaling value associated with a maximum output power of the electronic device:
determine a first region in which the electronic device is expected to wirelessly transmit the first analog electrical signal;
determine first operational constraints on wireless transmissions from the electronic device based at least in part on the first region;
instruct the electronic device to wirelessly transmit the first analog electrical signal using a first reduced output power determined based at least in part on the first operational constraints when overriding of the first network signaling value is enabled; and
instruct the electronic device to wirelessly transmit the first analog electrical signal using first power amplifier operational parameters determined based at least in part on the first reduced output power, first filter operational parameters determined based at least in part on the first reduced output power, or any combination thereof when overriding of the first network signaling value is not enabled.

2 . The electronic device of claim 1 , wherein:
the electronic device is configured to receive the first network signaling value associated with the maximum output power of the electronic device from wireless service provider; and when the electronic device is instructed to operate in accordance with the first network signaling value, the controller is configured to:
determine a second network signaling value different from the first network signaling value based at least in part on the first operational constraints associated with the first region;
determine an output power reduction value associated with the second network signaling value;
determine the first reduced output power by applying the output power reduction value to the maximum output power of the electronic device when overriding of the first network signaling value is enabled; and
determine the first power amplifier operational parameters associated with the output power reduction value, the first filter operational parameters associated with the output power reduction value, or any combination thereof when overriding of the first network signaling value is not enabled.

3 . The electronic device of claim 1 , wherein the controller is configured to:
determine the first region in which the electronic device is expected to wirelessly transmit the first analog electrical signal based at least in part on a location indication received from a global positioning system; and determine the first operational constraints based at least in part on the location indication, wherein the first operational constraints comprise protected transmission frequencies within the first region and spurious emission limits associated with the protected transmission frequencies within the first region.

4 . The electronic device of claim 1 , comprising:
a power supply communicatively coupled to the controller; and a power amplifier electrically coupled to the power supply, wherein the power amplifier is configured to facilitate generating the first analog electrical signal by amplifying an input signal based at least in part on a supply voltage received from the power supply; wherein the controller is configured to:
determine target voltage of the supply voltage based at least in part on voltage of an input signal to the power amplifier when difference between the first reduced output power and the maximum output power is less than a threshold and based at least in part on average output power when the difference between the first reduced output power and the maximum output power is not less than the threshold; and
instruct the electronic device to wirelessly transmit the first analog electrical signal using the first power amplifier operational parameters by instructing the power supply to provide the supply voltage with the target voltage to the power amplifier.

5 . The electronic device of claim 1 , comprising a filter communicatively coupled to the controller, wherein the filter is configured to facilitate generating the first analog electrical signal by filtering an input signal;
wherein the controller is configured to:
determine target filter strength based at least in part on difference between the first reduced output power and the maximum output power the electronic device; and
instruct the electronic device to wirelessly transmit the first analog electrical signal using the first filter operational parameters by instructing the filter to filter the input signal using the target filter strength.

6 . The electronic device of claim 1 , wherein:
the antenna is configured to wirelessly transmit a second analog electrical signal from the electronic device; and the controller configured to, when the electronic device is instructed to operate in accordance with the first network signaling value associated with the maximum output power of the electronic device:
determine a second region in which the electronic device is expected to wirelessly transmit the second analog electrical signal;
determine second operational constraints on wireless transmissions from the electronic device based at least in part on the second region, wherein the second operational constraints are different from the first operational constraints when the second region is different from the first region;
instruct the electronic device to wirelessly transmit the second analog electrical signal using a second reduced output power determined based at least in part on the second operational constraints when overriding of the first network signaling value is enabled; and
instruct the electronic device to wirelessly transmit the second analog electrical signal using second power amplifier operational parameters determined based at least in part on the second reduced output power, second filter operational parameters determined based at least in part on the second reduced output power, or any combination thereof when overriding of the first network signaling value is not enabled.

7 . The electronic device of claim 1 , wherein the electronic device comprises a portable phone, a media player, a personal data organizer, a handheld game platform, a tablet device, a computer, or any combination thereof.

8 . A method for implementing a radio frequency system to wirelessly transmit analog electrical signals, comprising:
determining, using processing circuitry, a first output power reduction value associated with a network signaling value when wirelessly transmitting a first analog electrical signal at an output power associated with a received network signaling value is not expected to meet a spurious emissions limit; instructing, using the processing circuitry, the radio frequency system to wirelessly transmit the first analog electrical signal at a first reduced output power determined based at least in part on the first output power reduction value when overriding of the received network signaling value is enabled; and when overriding of the received network signaling value is not enabled:
determining, using the processing circuitry, first power amplifier operational parameters associated with the first output power reduction value, first filter operational parameters associated with the first output power reduction value, or both; and
instructing, using the processing circuitry, the radio frequency system to wirelessly transmit the first analog electrical signal by operating a power amplifier using the first power amplifier ope

Assignees

• Apple Inc

Inventors

• Goedken Ryan J
• Liu Xueting
• Lum Nicholas W

Classifications

• H04W52/243

  taking into account interferences · CPC title

• H04W52/225

  Calculation of statistics, e.g. average or variance · CPC title

• H04W52/283

  Power depending on the position of the mobile · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04W52/52

  using AGC [Automatic Gain Control] circuits or amplifiers · CPC title