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Short wave channel model building method
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A short-wave channel and model modeling technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as large model errors and inability to accurately describe link channel characteristics
Active Publication Date: 2013-05-22
THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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[0003] The present invention provides a short-wave channel model modeling method, which is used to solve the problems in the prior art that are affected by the time-varying characteristics of short-wave channel parameters, the model error obtained by the existing channel modeling technology is relatively large, and the link channel characteristics cannot be accurately described. question
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Embodiment 1
[0040] Such as figure 1 As shown, the embodiment of the present invention provides a shortwave channel model modeling method, including:
[0041]Step S101, extracting M samples of a link from a database storing shortwave channel parameter samples, and obtaining multipath broadening parameters and Doppler broadening parameters in each sample;
[0042] In this step, the shortwave channel parameter samples in the database are parameter samples obtained through shortwave channel measurement experiments.
[0043] Further, in this step, in the database, according to preset time conditions, signal-to-noise ratio conditions, and sunspot number conditions, M samples that meet the conditions of a certain link are extracted. Among them, each condition can be flexibly set according to specific modeling requirements.
[0044] Step S102, using the multipath spreading parameters and Doppler spreading parameters of each sample as column vectors, constructing a channel parameter matrix with...
Embodiment 2
[0060] The embodiment of the present invention provides a shortwave channel model modeling method, the principle of which is the same as that of the method described in Embodiment 1. It is a further detailed elaboration of the method described in Embodiment 1 in combination with specific implementation details. The method includes:
[0061] Step A: Obtain channel parameter samples;
[0062] Step B: performing two-dimensional clustering combination on channel parameters;
[0063] Step C: Corresponding the cluster center to the channel model;
[0064] For the above step A, the specific implementation process is as follows:
[0065] According to modeling requirements, two types of uncorrelated channel parameters that can fully reflect channel characteristics are obtained: multipath broadening and Doppler broadening. Among them, the source of channel parameters: after completing the channel measurement experiment on a specific link, the channel parameters are analyzed and calcul...
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Abstract
The invention discloses a short wave channel model building method. The short wave channel model building method includes extracting M samples of a link from a database storing short wave channel parameter samples, and acquiring multipath broadening parameters and Doppler broadening parameters of the samples; utilizing the multipath broadening parameters and the Doppler broadening parameters in the samples as column vectors to establish a channel parameter matrix, and subjecting the vectors in the matrix to uniformization; detecting whether the number of array points covered in a neighborhood radius range of various cluster centers meets the cluster requirement or not; if yes, subjecting the cluster centers to de-uniformization and utilizing the multipath broadening parameters and the Doppler broadening parameters corresponding to the cluster centers subjected to de-uniformization as a short wave channel model. The short wave channel model building method solves the problem that a model obtained by existing channel building technology is large in error and cannot accurately describe the channel characteristics of the link.
Description
technical field [0001] The invention relates to the fields of shortwave channel modeling and mathematical statistics, in particular to a shortwave channel model modeling method. Background technique [0002] The shortwave channel is a typical time-varying parameter channel. The ionosphere changes randomly in the time domain, space domain and frequency domain, which makes the shortwave channel parameters change randomly, so that it is impossible to use an accurate channel model to describe the specific time domain, Channel characteristics in frequency and space domains. At present, the common method in the world is to use the channel model formed by ITU-RF.1487 according to the typical channel parameters of high, middle and low latitudes. However, due to the time-varying characteristics of short-wave channel parameters, the error between the channel model suggested by ITU and the actual channel model is too large, and the real-time channel parameters obtained by channel meas...
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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/391
Inventor 金珠李颖张跃宝管英祥任源博蒋宏奎王程林
Owner THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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