Satellite-ground cooperative signal transmission method and device under nonlinear power amplifier constraints
A signal transmission, non-linear technology, applied in the field of satellite communication, can solve problems such as non-linear distortion, aggravated interference intensity, non-linear effect of RF power amplifier, etc., and achieve the effect of reducing interference
Active Publication Date: 2020-09-25
TSINGHUA UNIV
View PDF13 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, for a satellite with a multi-antenna architecture, in order to ensure energy efficiency, the radio frequency power amplifier (referred to as "power amplifier") in the antenna at the transmitting end will work in the nonlinear region, which will cause the nonlinear effect of the radio frequency power amplifier, namely The output signal of the RF power amplifier is nonlinearly distorted compared to the input signal
This nonlinear distortion will make the precoding scheme in the prior art less effective in suppressing interference, and even aggravate the intensity of interference
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0026] figure 1 A schematic diagram of a satellite-ground cooperative signal transmission method under the constraint of a nonlinear power amplifier provided by an embodiment of the present invention, as shown in figure 1 As shown, the embodiment of the present invention provides a satellite-ground cooperative signal transmission method un...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The embodiment of the invention provides a satellite-ground cooperative signal transmission method and a device under the constraint of a nonlinear power amplifier. The method comprises the followingsteps: acquiring nonlinear model parameters of the power amplifier; constructing an optimization problem model based on the nonlinear model parameters; calculating an optimal solution of the optimization problem model to obtain an optimal input signal inputted to the power amplifier;and inputting the optimal input signal to the power amplifier for signal transmission. A method and apparatus for transmiting satellite-ground cooperative signals under the constraint of a nonlinear power amplifier is provided by an embodiment of the invention, according to the nonlinear model parameters of poweramplifier, By calculating the optimal solution of the optimization problem model, the optimal input signal of the input power amplifier is obtained, and the precoding scheme of the satellite launchingterminal is optimized under the condition that the power amplifier has nonlinear effect, which reduces the interference of the satellite communication system to the terrestrial cellular mobile systemon the premise of ensuring the communication rate of the satellite users.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of satellite communication, and in particular to a method and device for transmitting satellite-terrestrial cooperative signals under the constraints of nonlinear power amplifiers. Background technique [0002] The satellite-ground collaborative system refers to a communication system that has both satellites and satellite users, as well as ground base stations and ground users, and the satellites and ground base stations can cooperate with each other and serve users together. With the gradual popularization of smart communication devices, the bandwidth of the satellite communication system needs to be extended to a higher frequency band to increase the communication rate. However, the expansion of the bandwidth will cause part of the spectrum resources to be shared by the satellite communication system and the cellular mobile system on the ground, thus causing the interference of downl...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185G06F30/20G06F30/36H04B7/024
CPCG06F30/20G06F30/36H04B7/024H04B7/18513
Inventor 冯伟刘承骁葛宁
Owner TSINGHUA UNIV