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Method for analyzing time randomness of receiving-point group paths

A receiving point and group path technology, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problem of low availability of parameters, difficult calculation of parameters, low calculation accuracy and actual situation, etc. problem, to achieve the effect of improving credibility and accuracy

Active Publication Date: 2011-06-01
BEIHANG UNIV
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Problems solved by technology

In addition, the use of two-dimensional display and calculation method, the availability of the calculated parameters is not high (such as the angle of arrival of rays, etc.)
Therefore, the existing technology is not high in calculation accuracy and in line with the actual situation, and it is difficult to further apply the calculated parameters.

Method used

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  • Method for analyzing time randomness of receiving-point group paths
  • Method for analyzing time randomness of receiving-point group paths
  • Method for analyzing time randomness of receiving-point group paths

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Embodiment Construction

[0035] See figure 1 , the present invention is a method for analyzing the randomness of the path time of the receiving point group, and the specific steps of the method are as follows:

[0036] Step 1: Determine the geographic coordinates of the transmitting point and the receiving point and the predicted time period, and construct the spatial distribution of the refractive index.

[0037] The coordinates of the transmitting point are located in Zhengzhou, and its coordinates are (E113.63°, N34.80°), and the coordinates of the receiving point are located in Qingdao, and its coordinates are (E120.30°, N36.10°), and the selected prediction time is 2009. October 1st at 20:00. Using the international reference ionospheric IRI and the international geomagnetic field reference IGRF to predict and calculate the environmental conditions of ray propagation under the current conditions. The ionospheric electron concentration distribution of the two centers at 20:00, such as figure 2...

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Abstract

The invention discloses a method for analyzing the time randomness of receiving-point group paths, which comprises the following seven steps: 1, determining the longitudes and latitudes as well as forecasting time of a launching point and a receiving point so as to construct a dissemination environment; 2, calculating the great circle distance and the value range of a launching elevation angle according to geographic information; 3, solving a ray equation so as to obtain an estimated value of the launching elevation angle; 4, carrying out linear interpolation calculation, and solving an accurate value of the elevation angle; 5, repeating the steps 1 to 4 so as to obtain a value sequence of the group path in different time; 6, processing the sequence of the group path, and calculating a self-correlation coefficient; and 7, obtaining the correlation time of the group path according to the calculation result obtained in the step 6. The method disclosed by the invention has good practical value and a broad application prospect in the technical field of short-wave communication.

Description

(1) Technical field [0001] The invention relates to a method for analyzing the time randomness of a receiving point group path based on a ray tracing technology, and belongs to the technical field of short-wave communication. (2) Background technology [0002] Short-wave communication is the main method of current long-distance communication. Its frequency range is 3-30MHz, and it mainly relies on ionospheric reflection for propagation. In the process of short-wave propagation, the electron concentration in the ionosphere has a great influence on its operating frequency. When the concentration is high, the reflected frequency is high, and when the concentration is low, the reflected frequency is low. Because the height and electron concentration of the ionosphere change with the changes of the region, season, time, sunspot activity and other factors, it has a certain randomness. Therefore, the radio wave parameters received at the receiving point will also change correspond...

Claims

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Application Information

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IPC IPC(8): H04B17/00
Inventor 阎照文王刚于大鹏
Owner BEIHANG UNIV
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