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Static meteorological satellite channel modeling method

A technology of geostationary meteorological satellite and channel modeling, applied in the field of geostationary meteorological satellite channel modeling

Inactive Publication Date: 2013-11-20
NANJING UNIV OF INFORMATION SCI & TECH
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  • Description
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Problems solved by technology

[0002] As people's demand for meteorological information services continues to grow and their requirements for information service quality continue to improve, traditional meteorological services can no longer meet people's production and living needs.

Method used

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Embodiment

[0091] In order to verify the effectiveness of the present invention, the FY-2E geostationary meteorological satellite and the relevant data of the Guangzhou station in the vernal equinox in 2009 are used for simulation verification. The specific channel parameters are shown in Table 1.

[0092] Table 1 Partial simulation data

[0093] parameter name

[0094] satellite altitude

[0095] The level crossing rate and the average fading time are important second-order statistical characteristics in the channel, which reflect the communication quality of the satellite channel. The level crossing rate is a statistical process about time, which is defined as the average number of times the envelope is lower than a given threshold within 1s. The measured data of the level crossing rate is compared with the simulated data, such as Figure 10 shown. The average fading time is defined as the duration that the envelope of the received signal is lower than ...

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Abstract

The invention provides a static meteorological satellite channel modeling method, which comprises the following steps of: according to the spatial distribution situation of a satellite-to-ground link, successively analyzing the influence of free-space loss, ionospheric scintillation, atmospheric absorption, multipath and shadow on a channel link; according to the weather situation, establishing a static meteorological satellite Rice channel model and a Suzuki channel model; and according to a Markov chain, linking the Rice channel model and the Suzuki channel model in one dynamic model to reflect the influence on the transmission characteristic of the static meteorological satellite channel by the weather state change. The method disclosed by the invention has an important value on the signal modulation, the coding mode and the power control technology of static meteorological satellite communication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and specifically refers to a channel modeling method of a stationary meteorological satellite. Background technique [0002] As people's demand for meteorological information services continues to increase and their requirements for information service quality continue to improve, traditional meteorological services can no longer meet people's production and living needs. The use of meteorological satellites to help complete a full range of meteorological services has become the best choice for meteorological departments around the world. The most basic of meteorological satellite communication technology is the study of satellite channel propagation characteristics, which is related to the research of signal modulation, power control and other related technologies. At the same time, channel modeling is a relatively effective research method for channel propagation characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04W84/06
Inventor 郭业才袁涛张秀再吴礼福黄友锐
Owner NANJING UNIV OF INFORMATION SCI & TECH
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