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Method of calibrating an envelope tracking system, power voltage modulation method and apparatus thereof

A technology of envelope tracking and power supply voltage, which is applied to improve amplifiers to reduce temperature/power supply voltage changes, transmission systems, components of amplifying devices, etc., to achieve cost savings

Inactive Publication Date: 2014-10-01
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Therefore, there is an urgent need for a more efficient and cost-effective method to solve the problem of ET system calibration

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  • Method of calibrating an envelope tracking system, power voltage modulation method and apparatus thereof
  • Method of calibrating an envelope tracking system, power voltage modulation method and apparatus thereof
  • Method of calibrating an envelope tracking system, power voltage modulation method and apparatus thereof

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Embodiment Construction

[0026] Certain terms are used in the specification and following claims to refer to particular elements. Those skilled in the art should understand that manufacturers may use different terms to refer to the same component. This description and the subsequent claims do not use the difference in name as the way to distinguish components, but use the difference in function of the components as the criterion for distinguishing. "Includes" mentioned throughout the specification and subsequent claims is an open-ended term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" should be construed herein to include any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

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Abstract

A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (RF) transmitter module of a wireless communication unit. The method includes, within at least one signal processing module of the wireless communication unit, determining combinations of the power amplifier supply voltage and power amplifier input power that provide a power amplifier output power equal to a target output power, obtaining battery current indications for the determined combinations of the power amplifier supply voltage and power amplifier input power, selecting a combination of the power amplifier supply voltage and power amplifier input power that provide a power amplifier output power equal to a target output power based at least partly on the obtained battery current indications therefore, and calibrating the envelope tracking system using the selected combination of the power amplifier supply voltage and power amplifier input power.

Description

【Technical field】 [0001] The present invention relates to a calibration method and device for an envelope tracking system (envelope tracking system), in particular to a power supply for a power amplifier module used in a radio frequency (radio frequency, RF for short) transmitter of a wireless communication unit A method and device for calibrating a voltage envelope tracking system. 【Background technique】 [0002] The present invention mainly relates to and applies to the field of RF power amplifiers used in wireless communication systems. Continuing pressure from the limited spectrum available in wireless communication systems has forced the development of spectrally efficient linear modulation schemes. Since the envelope fluctuates in these linear modulation schemes, this phenomenon causes the average power transmitted by the antenna to be much lower than its maximum power, resulting in inefficient power amplifiers. Therefore, the field is dedicated to researching high-e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/30
CPCH03F1/32H04B17/001H03F1/02H04B17/13H03F3/24H03F1/0227
Inventor 曼诺·克兰多斯·安西索陈信宏乔纳森·理查·思创
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE
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