Broadband satellite channel simulator with variable channel model

A channel model, satellite channel technology, applied in the field of satellite testing, can solve the problems of poor expansion of input and output ports, low carrier rate, narrow input bandwidth, etc.

Inactive Publication Date: 2017-05-10
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

[0006] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, a broadband satellite channel simulator with real-time variable channel model is proposed, which effectively solves the problems of narrow input bandwidth, low carrie

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  • Broadband satellite channel simulator with variable channel model
  • Broadband satellite channel simulator with variable channel model
  • Broadband satellite channel simulator with variable channel model

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Embodiment Construction

[0038] The invention realizes the real-time simulation of the broadband satellite communication channel by combining software simulation and hardware simulation.

[0039] Such as figure 1 As shown, the statistical channel model of the Ka-band fixed satellite communication system can be regarded as superimposing different influencing factors on the basis of the original input signal X(t), including: describing free space propagation attenuation, rainfall attenuation, atmospheric absorption effect and cloud fading, etc. Theoretical model fading factor C(t), the propagation noise Z(t) collectively known as the external noise generated by the radio wave transmission environment and the internal noise of the receiving system, and the signal propagation delay DELAY between the geostationary orbit communication satellite and the ground.

[0040] The equivalent low-pass signal output signal r(t) after passing through the non-frequency selective fading channel can be expressed as:

[...

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Abstract

The invention provides a broadband satellite channel simulator with a variable channel model. The broadband satellite channel simulator comprises an analog-signal conversion module, an input signal amplitude adjustment module, a channel delay simulation module, a channel fading simulation module, a channel noise simulation module, an output signal amplitude adjustment module, a digital-analog conversion module and an upper computer control module. According to the channel simulator, problems of narrow input bandwidth, low carrier rate, delayed channel model parameter updating and poor input and output port extensibility of the existing channel simulator can be solved; and physical simulation and communication system verification of all kinds of broadband satellite communication programs can be supported effectively.

Description

technical field [0001] The invention belongs to the field of satellite testing and relates to a broadband satellite channel simulator, which can be used to simulate channel characteristics of broadband satellite communication. Background technique [0002] With the increasing demand for satellite communications and the natural advantages of Ka-band in terms of bandwidth and capacity, in recent years, more and more countries and institutions have joined in the development and use of Ka-band satellite communication systems. In terms of civil and commercial use, the US "Iridium Next" communication satellite system plans to carry Ka-band communication loads, and the new generation of high-throughput communication satellites in the United States, Europe, Russia, Japan and other countries will also use the Ka-band. In addition to civilian and commercial use, the U.S. military has begun to use 20 / 40GHz links for military communications, and the military value is increasingly reveal...

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Application Information

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IPC IPC(8): H04B17/391H04B17/00
CPCH04B17/0087H04B17/3911H04B17/3912
Inventor 张磊任术波梁宗闯陶滢冯瑄周钠辛宁
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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