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Transmitter with pre-distortion module and operation method thereof

A pre-distortion and transmitter technology, applied in the field of signal transmitters, can solve the problems that transmitters are difficult to meet signal-to-noise specifications, signal amplitude and phase distortion, etc.

Active Publication Date: 2014-06-11
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, power amplifiers can have non-linear amplification characteristics that distort the amplitude and phase of the signal, further making it difficult for the transmitter to meet signal-to-noise specifications

Method used

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  • Transmitter with pre-distortion module and operation method thereof
  • Transmitter with pre-distortion module and operation method thereof
  • Transmitter with pre-distortion module and operation method thereof

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Embodiment Construction

[0017] Please refer to figure 1 As shown, it is a schematic block diagram of an electronic device 100 according to an embodiment of the present invention. The electronic device 100 can be any device that uses wireless communication to transmit or receive data, and it includes a transmitter 110 based on a digital quadrature modulation architecture. like figure 1 As shown, the transmitter 110 includes a modulation / demodulation module 111 , a predistortion module 120 , a processing module 130 , a phase controller 140 and an amplifier 150 . The above components can be as figure 1 Connect as shown.

[0018] like figure 1 As shown, the amplifier 150 is a digital power amplifier, which provides a driving current to a load device, such as an antenna 101, according to a digital input signal. In one embodiment, the amplifier 150 is a radio frequency digital to analog frequency converter (RFDAC), which combines an RF mixer and a power amplifier driver in a single stage.

[0019] In...

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PUM

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Abstract

A transmitter that includes a pre-distortion module and a phase controller is provided. The pre-distortion module is configured to receive a first digital value and generate a first pre-distorted digital value based on the first digital value and a corresponding angle. The first digital value is a combination of an in-phase component and a quadrature component of a signal for transmission. The phase controller is configured to control an amplifier to drive a current according to the first pre-distorted digital value and phase information in relation to the first digital value during a first phase range of a carrier signal determined at least partially based on the angle.

Description

technical field [0001] The present invention relates to a signal transmitter, in particular a signal transmitter with a predistortion module and a method of operation thereof. Background technique [0002] Typically, a transmitter may contain more than one power amplifier to provide greater power to a load device, such as an antenna. However, power amplifiers can have non-linear amplification characteristics that distort the amplitude and phase of the signal, further making it difficult for the transmitter to meet signal-to-noise specifications. Contents of the invention [0003] The invention provides a transmitter, which includes a pre-distortion module and a phase controller. The pre-distortion module is used to receive a first digital value, and generate a first pre-distortion digital value according to the first digital value and a corresponding distortion angle, wherein the above-mentioned first digital value is the in-phase part of the signal to be transmitted and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H04L27/38
CPCH04B1/0475H04B2001/0425H03F1/3241
Inventor 胡拉姆·穆罕默德
Owner MEDIATEK INC