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Single carrier frequency domain equalization method of mobile communication of low-orbit satellites

A single-carrier frequency domain, low-orbit satellite technology, applied in the field of low-orbit satellite mobile communication single-carrier frequency domain equalization, can solve problems such as signal distortion

Active Publication Date: 2017-02-15
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0006] The present invention aims to overcome the signal distortion problem of the low-orbit satellite mobile communication system, thereby providing a single-carrier frequency-domain equalization method for low-orbit satellite mobile communication

Method used

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  • Single carrier frequency domain equalization method of mobile communication of low-orbit satellites
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  • Single carrier frequency domain equalization method of mobile communication of low-orbit satellites

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Embodiment approach 1

[0058] Specific implementation mode 1. Single-carrier frequency domain equalization method for low-orbit satellite mobile communication, aimed at low-orbit satellite mobile communication system, regardless of the unique time-varying characteristics of its channel and the multipath effect caused by the rapid movement of low-orbit satellites Whether the signal is distorted or the signal interference caused by the carrier frequency offset existing in the entire communication channel needs to be overcome with reasonable technology. This application will focus on the SC-FDE technology used to overcome the above signal distortion.

[0059]There are many algorithms in SC-FDE technology, but they can generally be summarized into two categories: linear equalization and nonlinear equalization. The linear equalization structure is relatively simple, and its output is only related to the feedforward equalizer, and there is no feedback signal for secondary equalization. The nonlinear equa...

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Abstract

The invention provides a single carrier frequency domain equalization method of mobile communication of low-orbit satellites, and relates to single carrier frequency domain equalization technology of mobile communication of low-orbit satellites. The single carrier frequency domain equalization method provided by the invention aims at solving the problem of signal distortion of a mobile communication system of low-orbit satellites. In the mobile communication system of the low-orbit satellites, in an IBDFE algorithm, approximate processing is carried out on a received signal that has been processed on the basis of a linear equalization algorithm for one time before decision feedback, iterative equalization output and an MSE in the frequency domain are derived successively, values of an equalization tap coefficient and a feedback filter tap coefficient in an IBDFE equalizer are acquired, and single carrier frequency domain equalization of the mobile communication of the low-orbit satellites is achieved. The single carrier frequency domain equalization method provided by the invention is applicable to the single carrier frequency domain equalization of the mobile communication of the low-orbit satellites.

Description

technical field [0001] The invention relates to a low orbit satellite mobile communication single carrier frequency domain equalization technology. Background technique [0002] Today, the world has already entered the era of information and big data with rapid and rapid development, and the development of the communication industry also occupies a place in the entire wave of technological progress. Traditional communication networks can no longer meet the needs of modern society, and the integration of space, space and ground information will be the future of communication network architecture. [0003] The space-space-ground integrated network with the satellite network as the backbone is composed of the deep space network, adjacent space network, and ground network. Its core idea is to first establish a pan-satellite communication network system, which includes almost all orbital and functional satellite communication systems, and then connect sea, land, The three types...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04B7/185
CPCH04B7/1853H04L25/03019H04L25/03038H04L25/03159H04L25/03267H04L2025/03522
Inventor 王振永耿驰马铭李德志李杰袁泉韩宇
Owner HARBIN INST OF TECH
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