Mixed channel fading based interference analysis method for satellite terrestrial integration system

A channel fading and analysis method technology, applied in the field of telecommunication, can solve problems such as fading, and achieve the effect of fast interference calculation, easy Matlab calculation, and reduced computational complexity

Active Publication Date: 2017-12-26
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0007] Aiming at the problems existing in the interference analysis of the current satellite-ground integrated system, the pres

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  • Mixed channel fading based interference analysis method for satellite terrestrial integration system
  • Mixed channel fading based interference analysis method for satellite terrestrial integration system
  • Mixed channel fading based interference analysis method for satellite terrestrial integration system

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Embodiment Construction

[0036] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] The satellite-terrestrial integrated system includes a mobile satellite network and a ground auxiliary network ATC. The present invention mainly analyzes the downlink co-channel interference (CCI) of ATC users under the satellite-terrestrial integrated system. The interference analysis of the present invention is based on the user performance analysis of the mixed fading channel, and uses the outage probability to evaluate the user performance.

[0038] Consider the situation that the satellite-ground integrated system is interference-limited, that is, the noise factor can be ignored, so that the received signal y of the target ATC user d It can be expressed as:

[0039]

[0040] Among them, P b ,P s and P t Respectively represent the transmit power of the ATC serving base station, the transmit power of...

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Abstract

The invention relates to a mixed channel fading based interference analysis method for a satellite terrestrial integration system and belongs to the technical field of telecommunication. According to the method, first of all, by use of a mixed fading model EGK, probability distribution density of ground link receiving signals is established, wherein the mixed fading model internally comprises shadow fading and multipath fading; then by use of Gamma distribution, power spectrum density of set total interference of other ATC base stations is represented; power spectrum density of satellite set total interference is represented by use of a Shadowed-Rician model; ATC user interruption probability Pout is defined according to a signal-to-interference ratio threshold gamma th of user receiving power; and a closed expression of the ATC user interruption probability Pout is obtained, the Pout is calculated according to the expression by use of a Matlab tool, and ATC user downlink same-frequency interference analyzing is performed. By use of the method, interference analysis is more comprehensibly and accurate, calculation is more rapid, interference calculation is faster, more convenient and easier, and interference conditions can be rapidly and conveniently obtained.

Description

technical field [0001] The invention belongs to the technical field of telecommunications, and in particular relates to an interference analysis method based on mixed channel fading of a satellite-ground integrated system. Background technique [0002] In 2009, the International Telecommunication Union (ITU) defined an integrated system including mobile satellite network (MSS) and terrestrial auxiliary network (ATC). The ground auxiliary network composed of ATC base stations can adopt 3G or 4G wireless interface. Satellite and terrestrial networks share spectrum resources. Satellite networks mainly serve remote areas that cannot be covered by terrestrial networks. ATC mainly serves densely populated urban areas and is deployed based on the LTE-FDD wireless standard. It can provide reliable communication services and extend ground coverage indoors and in areas without LOS (Line of Sight, Line of Sight) connections. Although satellite mobile operators have long been authori...

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Application Information

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IPC IPC(8): H04B17/336H04B17/345H04B17/391H04B17/327H04J11/00H04B7/185
CPCH04B7/18526H04B17/327H04B17/336H04B17/345H04B17/3911H04J11/0056
Inventor 王卫东李博赵雪胡欣
Owner BEIJING UNIV OF POSTS & TELECOMM
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