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Method for evaluating maximum passable bandwidth of short-wave sky-wave channel

A bandwidth and sky wave technology, which is applied in the field of evaluating the maximum passable bandwidth of shortwave sky wave channels, can solve problems such as signal bandwidth limitation, and achieve the effect of solving the problem of reasonable bandwidth selection.

Active Publication Date: 2020-05-12
中国电波传播研究所
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Problems solved by technology

For the selection or evaluation of short-wave signal bandwidth, the main problems are as follows: 1) The ionosphere has strong time-varying characteristics, and the selected bandwidth needs to adapt to the real-time changes of the ionosphere; Consider the limitations of various transmission characteristics of the ionosphere on the signal bandwidth

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  • Method for evaluating maximum passable bandwidth of short-wave sky-wave channel
  • Method for evaluating maximum passable bandwidth of short-wave sky-wave channel
  • Method for evaluating maximum passable bandwidth of short-wave sky-wave channel

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Embodiment 1

[0054] Example 1, such as figure 1 As shown, this embodiment discloses a method for evaluating the maximum passable bandwidth of a short-wave sky-wave channel, including the following steps:

[0055] Step 1, conduct radio wave environment detection: conduct ionospheric detection on the designated propagation link using chirp signals, and conduct interference monitoring at the location of the receiving system;

[0056] Radio wave environment detection methods include ionospheric detection and interference monitoring, and ionospheric detection methods include oblique detection and backscatter detection. When detecting a specified link, the oblique detection transceiver equipment should be arranged at both ends of the link, and the backscatter detection equipment should be arranged at one end of the link. The signals transmitted by each detection device should use chirp signals, and the signal bandwidth is determined according to the maximum bandwidth required by shortwave appli...

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Abstract

The invention discloses a method for evaluating the maximum passable bandwidth of a short-wave sky-wave channel. The method comprises the following steps: step 1, carrying out electric wave environment detection; step 2, processing the ionospheric detection receiving signal; and step 3, evaluating the bandwidth availability. The invention discloses a short-wave sky-wave channel maximum passable bandwidth evaluation method based on electric wave environment detection. Transmission conditions of an ionized layer on signals with different bandwidths and interference conditions of short-wave bandfrequencies are comprehensively considered, the maximum passable bandwidth adapting to electric wave environment changes is provided for short-wave communication, and the requirement for reasonable bandwidth selection of short-wave communication is met.

Description

technical field [0001] The invention belongs to the field of ionospheric detection and short-wave communication, in particular to a method for evaluating the maximum passable bandwidth of a short-wave sky-wave channel in the field. Background technique [0002] There are two propagation modes of short wave (λ=100-10m) including ground wave propagation and sky wave propagation, among which sky wave propagation is the main propagation mode. The short-wave sky-wave propagation mainly relies on the refraction effect of the ionosphere on electromagnetic waves. Short-wave communication and other technologies have applied this special short-wave propagation mechanism, which has the unique advantages of long propagation distance and strong resistance to destruction. With the development of technology, the data volume requirements of short-wave communication are gradually increasing, and short-wave broadband communication has become the future development direction. However, as the ...

Claims

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Application Information

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IPC IPC(8): H04W24/08H04B17/309H04B17/345H04W28/20
CPCH04W24/08H04B17/309H04B17/345H04W28/20
Inventor 李雪雍婷苏重阳王岳松王俊江
Owner 中国电波传播研究所
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