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RF transmitter, integrated circuit device, wireless communication unit and method therefor

A technology of radio frequency transmitter and radio frequency signal, which is applied in the direction of electrical components, amplifiers, digital transmission systems, etc., and can solve the problem that the clock frequency cannot be realized

Active Publication Date: 2012-10-24
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such clock frequencies are not achievable in practical CMOS and / or subscriber communication units

Method used

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  • RF transmitter, integrated circuit device, wireless communication unit and method therefor
  • RF transmitter, integrated circuit device, wireless communication unit and method therefor
  • RF transmitter, integrated circuit device, wireless communication unit and method therefor

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Embodiment Construction

[0022] Certain terms are used throughout the specification and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open-ended term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the 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.

[0023] The present invention provides a rad...

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Abstract

A radio frequency (RF) transmitter has at least one digital signal processing module and at least one power amplifier module. The digital signal processing module includes at least one digital pre-distortion component arranged to receive at least one complex input signal, perform two-dimensional non-uniform mapping of the complex input signal to a first, in-phase, digital pre-distortion control word and a further, quadrature, digital pre-distortion control word, and output the in-phase and quadrature pre-distortion digital control words. The power amplifier module includes a first, in-phase, array of switch-mode power cells and at least one further, quadrature, array of switch-mode power cells. The two-dimensional non-uniform mapping has a pre-distortion profile at least partly based on an input / output relationship for the power amplifier module arranged to generate an analogue RF signal based at least partly on the in-phase and quadrature digital pre-distortion control words.

Description

technical field [0001] The invention relates to a radio frequency transmitter, an integrated circuit device, a wireless communication unit and a communication method thereof. Background technique [0002] With the continuous advancement of deep submicron CMOS (complementary metal oxide semiconductor) technology, digital circuits have become smaller and more power efficient. However, deep submicron CMOS processes are not particularly effective for scaling analog circuits. Therefore, in many devices such as radio frequency (RF) transmitters, it is always desirable to move as much as possible (for example with the help of digital signal processing algorithms) in order to be able to use more deep submicron CMOS processes to reduce size except analog components or analog circuits. [0003] In addition, many conventional RF transmitters use linear power amplifiers (PAs), and such conventional RF transmitters are also inefficient due to the generally low efficiency of linear PAs....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H04B1/00H04B1/04H04L25/02
CPCH04L27/367H04B2001/0425H04B1/0475H03F1/3241
Inventor WANG HUALU CHAOLIU JULIAPENG CHUN-HSIENSON SANG WONLIANG PAUL CHENG PO
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE
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