Transmitter and transmitter signal processing method

A transmitter and signal technology, applied in the field of communication, can solve the problems affecting the digital baseband signal effect and signal mutation, and achieve the effect of improving linearity and ensuring consistency

Active Publication Date: 2010-01-27
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

However, in this scheme, the pre-distortion processing unit performs pre-distortion processing on the input digital baseband signal according to the pre-distortion parameters output by the adaptive tracking algorithm unit. If the pre-distortion parameters output by the adaptive tracking algorithm unit and the pre-distortion processing unit If the digital baseband signal does not match, it will cause a sudden change in the signal output by the pre-distortion processing unit, which will affect the effect of pre-distortion processing on the digital baseband signal

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  • Transmitter and transmitter signal processing method

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Embodiment Construction

[0026] In the transmitter and the signal processing method of the transmitter of the present invention, the look-up table control unit can detect the input digital baseband signal, and send an update signal to the pre-distortion processing unit after the predetermined frame of the input digital baseband signal ends, and the pre-distortion The processing unit extracts the digital pre-distortion parameters from the look-up table storage unit according to the update signal, which ensures the consistency of the input digital baseband signal and the extracted digital pre-distortion parameters, and there will be no sudden change in the signal output by the pre-distortion processing unit, improving the The linearity of the output signal of the transmitter of the present invention is improved.

[0027] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] The transmitter of the present invention, suc...

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Abstract

The invention discloses a transmitter and a transmitter signal processing method. The transmitter comprises a pre-distortion processing unit, a digital-analog conversion unit, a radio frequency unit, a power amplifier, a coupler, a feedback radio frequency unit, an analog-digital conversion unit, an adaptive tracking algorithm unit, a lookup table storage unit and a lookup table control unit; the lookup table control unit is used for detecting input digital baseband signals, and sending an update signal to the pre-distortion processing unit when a predestinated frame of input digital baseband signals ends; the pre-distortion processing unit takes a digital pre-distortion parameter out of the lookup table storage unit according to the update signal, and carries out pre-distortion on the input digital baseband signal according to the taken out digital pre-distortion parameter. The transmitter and the transmitter signal processing method ensure that signals output by the pre-distortion processing unit can not generate jumps, thus improving the pre-distortion effect of the input digital baseband signal, namely stability and reliability.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a transmitter and a signal processing method of the transmitter. Background technique [0002] Improving the efficiency of the transmitter and reducing power consumption is a hot spot in the industry at present. In the existing wireless communication technology, in order to improve the utilization of limited spectrum resources, most communication systems use modulation methods with high spectrum utilization, such as QPSK, etc. These modulation methods will produce non-constant envelope modulation with a large peak-to-average ratio Signal, for the signal generated by the widely used multi-carrier combining technology, it will produce large envelope fluctuations, and the peak average of the signal will increase. The linearity requirements for the digital-to-analog conversion unit, radio frequency unit, and power amplifier of the transmitter higher. Due to the unavoidable n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49
Inventor 杨志涛施英刘志曾维赖文强张远见
Owner COMBA TELECOM SYST CHINA LTD
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