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

A satellite data and interference cancellation technology, applied in the field of satellite data reception, can solve the problems such as the large influence of the demodulation result and the difficulty in meeting the requirements of the cross-polarization interference cancellation method, and achieve the effect of good cancellation performance

Active Publication Date: 2022-06-24
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

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

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Abstract

The invention provides a method for canceling cross-polarization interference of a dual-polarization satellite data receiving system based on an intermediate frequency, comprising: converting the received two-channel signals into digital signals by the dual-polarization satellite data receiving system; The signal is digitally down-converted to obtain a digital zero-IF signal; the digital zero-IF signal of the two channels is respectively low-pass filtered; the low-pass filtered signal is divided into a branch and sent to the intermediate frequency horizontal equalizer of the other channel; Use the intermediate frequency transverse equalizer to form a compensation signal with the same frequency characteristics as the interference signal; subtract the compensation signal output by the transverse filter from the main signal, and output the canceled signal, that is, complete the cross-polarization interference cancellation. The above solution can achieve better cancellation performance when the two signals have frequency difference, phase difference, and code rates of the two signals are inconsistent, and at the same time can effectively adapt to the situation of large cross-polarization interference.

Description

technical field [0001] The present application relates to the technical field of satellite data reception, and in particular, to a cross-polarization interference cancellation method for an intermediate frequency-based dual-polarization satellite data reception system. Background technique [0002] With the wide application of high-resolution and hyperspectral technologies, the amount of data generated by remote sensing satellites has increased exponentially, while the spectrum resources allocated to satellite-to-ground data transmission by remote sensing satellites are limited. The use efficiency of the spectrum must be improved, and the dual circular polarization multiplexing technology is one of the most ideal technologies. The dual circular polarization multiplexing technology can transmit remote sensing satellite data to the satellite data receiving system through two mutually orthogonal polarized waves. However, due to the non-ideal characteristics of the polarization ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B7/185
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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