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Method and apparatus for improving power amplifier efficiency in wireless communication systems

A technology of wireless communication equipment and amplifiers, applied in the direction of improving amplifiers to improve efficiency, wireless communication, components of amplifiers, etc.

Active Publication Date: 2005-08-24
RES IN MOTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the battery power is consumed in the power amplifier section of the wireless device's transmitter

Method used

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  • Method and apparatus for improving power amplifier efficiency in wireless communication systems
  • Method and apparatus for improving power amplifier efficiency in wireless communication systems
  • Method and apparatus for improving power amplifier efficiency in wireless communication systems

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Embodiment Construction

[0052] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. Additionally, well-known methods, procedures, and components have not been described in detail so as not to obscure the present invention.

[0053] As is known, wireless communication devices generate internal data signals that are transmitted using radio transmitters. The data signal is usually a relatively low frequency signal, which is usually called a baseband signal. The baseband signal is mixed with a much higher frequency carrier signal to produce the transmitted signal. The transmit signal is amplified in one or more amplification stages of the output power amplification module to produce an amplified transmit signal that is sufficiently powered to be received with little or no da...

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Abstract

A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.

Description

technical field [0001] The present invention relates to wireless communication devices. More particularly, it relates to methods and apparatus for improving power amplifier efficiency in wireless communication systems having variable transmit power and / or peak-to-average power ratio over a wide range. Background technique [0002] Handheld wireless communication devices and other types of wireless transmitters are often powered by one or more internal batteries. A key performance indicator of such a device is its battery life, which is usually defined as the period of time that a battery can power the device on a single charge. Most of the battery power is consumed in the power amplifier section of the wireless device's transmitter. The power amplifier section amplifies the power of the signal to be transmitted from relatively low internal power levels to the much higher power levels required for wireless communication with remote base stations and other devices. Improvin...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03G3/00H03G3/30H04B7/005
CPCH03F2200/504H03F2200/331H03F1/0266Y02B60/50H03F1/0227H03G3/004H03G3/3042H04W52/18H04W52/241Y02D30/70
Inventor 曾文彦纳塞尔乌拉·汗焦庆中金鑫纳古拉·塔尔玛·桑加里迈克尔·弗伦茨·哈比歇尔
Owner RES IN MOTION LTD
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