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Cross polarization interference cancellation method for dual-polarization satellite data receiving system based on intermediate frequency

A technology of satellite data and receiving system, applied in the field of satellite data receiving, can solve the problems of great influence of demodulation results, difficult to meet the needs of the cross-polarization interference cancellation method, etc., and achieve the effect of good cancellation performance

Active Publication Date: 2021-04-09
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

[0006] The embodiment of the present application aims to provide a cross-polarization interference cancellation method based on an intermediate frequency dual-polarization satellite data receiving system to solve the problem that the cross-polarization interference cancellation method in the prior art is difficult to meet the demand and is affected by the demodulation result larger technical issues

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  • Cross polarization interference cancellation method for dual-polarization satellite data receiving system based on intermediate frequency
  • Cross polarization interference cancellation method for dual-polarization satellite data receiving system based on intermediate frequency
  • Cross polarization interference cancellation method for dual-polarization satellite data receiving system based on intermediate frequency

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

[0043] Such as f...

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Abstract

The invention provides a cross polarization interference cancellation method for a dual-polarization satellite data receiving system based on intermediate frequency. The method comprises the following steps: the dual-polarization satellite data receiving system converting two received channel signals into digital signals; performing digital down-conversion on the converted digital signal to obtain a digital zero intermediate frequency signal; performing low-pass filtering on the digital zero intermediate frequency signals of the two channels respectively; dividing each signal after low-pass filtering into a branch and sending the branch to an intermediate-frequency transverse equalizer of another channel; forming a compensation signal with the same frequency characteristic as the interference signal by using an intermediate frequency transverse equalizer; and subtracting the compensation signal output by the transverse filter from the main signal, and outputting a cancelled signal, thereby completing cross polarization interference cancellation. According to the scheme, good cancellation performance can be obtained under the conditions of frequency difference and phase difference of two paths of signals and inconsistent code rates of the two paths of signals, and meanwhile, the method can effectively adapt to the condition of large cross polarization interference.

Description

technical field [0001] The present application relates to the technical field of satellite data reception, in particular, to a method for canceling cross-polarization interference of an intermediate frequency-based dual-polarization satellite data receiving system. Background technique [0002] With the wide application of high-resolution and hyperspectral technology, the amount of data generated by remote sensing satellites is increasing geometrically, and the spectrum resources allocated to satellite-ground data transmission of remote-sensing satellites are limited. In order to increase the capacity of satellite-ground data transmission, the It is necessary to improve the use efficiency of the spectrum, and the dual circular polarization multiplexing technology is one of the most ideal technologies. Dual circular polarization multiplexing technology can transmit remote sensing satellite data to the satellite data receiving system through two mutually orthogonal polarizatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L25/03
CPCH04B7/1851H04L25/03
Inventor 李亚林冯旭祥张洪群李安徐璐陈金树张雨濛牛童瑶殷慈
Owner AEROSPACE INFORMATION RES INST CAS
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