Pre-correction method and device for radio frequency transmitting system

A radio frequency transmission and pre-correction technology, applied in the field of communications, can solve problems such as reducing costs

Active Publication Date: 2017-12-19
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem solved by the present invention is to reduce the complexity

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  • Pre-correction method and device for radio frequency transmitting system
  • Pre-correction method and device for radio frequency transmitting system
  • Pre-correction method and device for radio frequency transmitting system

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Embodiment Construction

[0092] At present, the spectrum used in wireless communication is getting wider and wider, and the adoption of technologies such as high-order modulation, multi-carrier technology, and carrier aggregation has significantly increased the peak-to-average ratio of uplink signals; The linear nature of high power transmitters causes stress. Various communication standards will impose strict requirements on the adjacent channel leakage ratio (Adjacent Channel Leakage Ratio, ACLR) and spectrum mask of the transmission. In order to meet these requirements, it is necessary to allow the signal to have a large power back-off (BOF) when designing the power amplifier. ), it is very uneconomical to do so, so it is necessary to introduce pre-distortion technology to ensure the linearity of the radio frequency transmission system.

[0093] As mentioned above, the existing pre-distortion technology has also been widely used in radio frequency transmission systems, but its implementation is rel...

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Abstract

The invention discloses a pre-correction method and a device for a radio frequency transmitting system. The method comprises steps: original to-be-transmitted data of the radio frequency transmitting system are scaled to generate index data, wherein the index data are adapted to the current transmitting power of the radio frequency transmitting system; a correction table is queried according to the index data to obtain a pre-correction factor, wherein the correction table is obtained by adopting the maximum transmitting average power of the radio frequency transmitting system for training; and the pre-correction factor is used to correct the original to-be-transmitted data to correct the nonlinearity of the radio frequency transmitting system. The method and the device can reduce the complexity and reduce the cost.

Description

technical field [0001] The invention relates to the communication field, in particular to a pre-correction method and device for a radio frequency transmission system. Background technique [0002] Pre-distortion, also known as "pre-distortion" and "pre-distortion" (Digital Pre-Distortion, DPD), is a method of digitally processing the signal in the digital domain before transmitting the signal, which is opposite to the nonlinear characteristics of the nonlinear device. Distortion to achieve the effect of offsetting the nonlinear characteristics of nonlinear devices. [0003] The existing pre-distortion technology has also been widely used in radio frequency transmission systems, but its implementation is relatively complicated and the cost is high. Contents of the invention [0004] The technical problem solved by the invention is to reduce the complexity and cost of the pre-distortion used in the radio frequency transmitting system. [0005] In order to solve the above ...

Claims

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Application Information

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IPC IPC(8): H04L25/49
CPCH04L25/49
Inventor 刘鑫李俊强翁毅
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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