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Linearization System of RF Power Amplifier Based on Broadband Modulator

A modulator and radio frequency technology, applied in the direction of synchronization/start-stop system, etc., can solve the problems of complex nonlinear compensation parameters and poor effect, and achieve the effect of improving the effect of nonlinear compensation

Active Publication Date: 2017-11-10
SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a radio frequency power amplifier linearization system based on a broadband modulator, which solves the problem that the nonlinear compensation parameters of predistortion are complicated and the effect is not good

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  • Linearization System of RF Power Amplifier Based on Broadband Modulator
  • Linearization System of RF Power Amplifier Based on Broadband Modulator
  • Linearization System of RF Power Amplifier Based on Broadband Modulator

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Embodiment Construction

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all examples. Based on the implementation of the present invention For example, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] In order to facilitate the understanding of the embodiments of the present invention, specific embodiments will be taken as examples for further explanation below in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

[0031] A radio frequency power amplifier linearization system based on a broadband modulator, including a receiving device 1, a channel 2 and a ...

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Abstract

The invention relates to a radio-frequency power amplifier linearization system based on a broadband modulator. The system comprises a receiving device, a channel and an emitting device. The emitting device at least comprises a test data generation device, a predistortion device, a modulation device and a power amplification device. The receiving device at least comprises a synchronous demodulation device, a data recovery device and a predistortion parameter calculation device. According to the predistortion parameter calculation device, a predistortion coefficient vector A is acquired by the optimized variable step size LMS algorithm, and the predistortion device is configured through the acquired coefficient. After an emitted signal matrix U passes the predistortion device, the predistortion device output vector Z is acquired by that Z = UA. According to the system, on the basis that the original LMS algorithm is not modified, the segment interval is refined and the step size is replaced, the step size factors of the LMS algorithm are corrected, the predistorted out-of-band rejection is increased by about 3dB and is closer to the optimal coefficient, and the nonlinear predistortion compensation effect is improved.

Description

technical field [0001] The invention relates to a radio frequency power amplifier linearization system, in particular to a radio frequency power amplifier linearization system based on a broadband modulator. Background technique [0002] According to the current situation and development trend of remote sensing satellites and various payload technologies at home and abroad, the amount of information and data acquired by spacecraft products is increasing by leaps and bounds, and the demand for improving the satellite-to-ground transmission rate is particularly urgent. In order to meet the requirements of high-speed satellite-to-ground data transmission in the future, effectively promote the technological progress of my country's satellite system and ground system, expand the application field of earth observation satellites, solve the problem of shortage of broadband signal frequency resources, and study broadband modulation of high-frequency band utilization Digital transmiss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49
Inventor 李惠媛向前杨津浦
Owner SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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