Signal correction method and device in a gsm system

A GSM system and signal technology, applied in the field of communication, can solve the problems of inability to calibrate the signal, unable to select sample data, etc.

A GSM system and signal technology, applied in the field of communication, can solve the problems of inability to calibrate the signal, unable to select sample data, etc.

CN102790978BActive Publication Date: 2016-08-24南通东湖国际商务服务有限公司
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  • Signal correction method and device in a gsm system
  • Signal correction method and device in a gsm system
  • Signal correction method and device in a gsm system

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Embodiment Construction

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] The embodiment of the present invention provides a signal correction method and device in the GSM system in order to select better sample data, effectively correct the signal in advance, and reduce the distortion of the output signal of the power amplifier. image 3 The signal correction process in the GSM system that the embodiment of the present invention provides, this process comprises the following steps:

[0028] S301: For the acquired sample pair formed by the modulus of the forward digital signal sequence and the feedback digital signal s...

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Abstract

A method and an apparatus for signal calibration in GSM system are provided. The method and apparatus determine the position of the forward digital signal sequence and feedback digital signal sequence when every local minimum value appears in sample pair set, and determine the almost period of the forward digital signal and feedback digital signal in the position where every local minimum value appears, then select sample pair whose system delay meet the determined requirement as the data for the use of carrying digital predistortion processing to carry the calibration according to the estimation value of the system delay corresponding to the sum of the every forward digital signal and feedback digital signal's almost period difference. The method of digital predistortion training sample selection based on the present embodiment ensures the correctness of the selected sample, controls the feedback signal's error vector magnitude, prevents phase distortion, then ensures the accuracy of the calibration.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a signal correction method and device for a Global System of Mobile communication (GSM) system. Background technique [0002] figure 1 It is the relationship between the input signal and the output signal after the non-linear power amplifier in the prior art. according to figure 1 It can be seen that due to the non-linearity of the power amplifier, especially when the output of the power amplifier is close to the saturation area, the signal distortion is serious, especially in the part with a large signal amplitude, but at the same time when the power amplifier is working close to the saturation area of ​​the output signal, Its work efficiency is higher. Therefore, there is a need to reduce the distortion of the power amplifier. A digital predistortion (Digital Predistortion, DPD) technology can correct a signal in advance to reduce distortion of a power amplif...

Claims

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Application Information

Patent Timeline
24 Aug 2016
Publication
CN102790978B
IPC
H04W24/00; H04L25/49
CPC
H04L27/2017
Inventors
李子荣; 岳亮