Aircraft data link adaptive encoding and modulation method

A technology of adaptive coding and coding modulation, applied in digital transmission system, electrical components, error prevention, etc., can solve the problems that it is difficult to reflect the performance of aircraft data link realistically, so as to improve the effectiveness and reliability, and overcome the experimental period long effect

Inactive Publication Date: 2012-09-12
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, traditional research methods are generally based on full digital simulation, which is difficult to realistically reflect the performance of the aircraft data link in real scenarios

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  • Aircraft data link adaptive encoding and modulation method
  • Aircraft data link adaptive encoding and modulation method
  • Aircraft data link adaptive encoding and modulation method

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Embodiment Construction

[0025] The present invention will now be further described in conjunction with the embodiments and drawings:

[0026] See figure 1 with figure 2 As shown in the embodiments, the implementation process of the semi-physical simulation technology of the present invention is as follows:

[0027] 1) According to the aircraft data link simulation needs, select the 10 coding and modulation methods in Table 1, and calculate the throughput R n =M i ×r i , R i (i≤0), the calculation results are shown in Table 1;

[0028] 2) Basis Through computer simulation, the coded modulation method in Table 1 is obtained under the Gaussian channel bit error rate curve, such as image 3 As shown, when the bit error rate is P≤10 -5 Under the conditions, determine the signal-to-noise ratio threshold of various coding and modulation methods γ i ,As shown in Table 1.

[0029] 3) It can be seen from Table 1 that the throughput R of the coding modulation method i For (2 / 3, 1, 1, 3 / 2, 2, 1, 3 / 2, 4 / 3, 2, 3):

[0030...

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Abstract

The invention provides an aircraft data link adaptive encoding and modulation method which is characterized by: choosing i suitable encoding methods and j suitable modulation methods according to an aircraft data link simulation requirement, and calculating the throughput of the encoding and modulation method; through the computer simulation, obtaining bit error rate simulation curves of q encoding and modulation methods under the Gauss channel, and filtering out m candidate encoding and modulation methods from the q encoding and modulation methods under an error rate condition. According to the method, not only can a shortcoming of full digital simulation be overcome, but also insufficiency of a long test cycle, difficult repeatability, difficult extraction of test data and high test cost of a 'pull distance' test can be overcome, a reliable basis is provided for the future practical application of aircraft data link adaptive encoding and modulation technology, and the validity and reliability of aircraft data link information transmission are raised.

Description

Technical field [0001] The invention relates to an adaptive coding and modulation method, in particular to an adaptive coding and modulation method for an aircraft data link, which is used for research on the reliability and effectiveness of the aircraft data link information transmission. Background technique [0002] Coding and modulation methods have been widely used for information transmission in aircraft data links. At present, the encoding and modulation modes used in aircraft data links are relatively simple, and the transmission reliability is limited in complex electromagnetic environments, and the transmission rate and anti-interference ability are limited. Applying adaptive coding and modulation technology to the aircraft data link can adaptively adjust the coding and modulation modes according to the aircraft channel conditions, thereby effectively improving the throughput of data transmission. However, traditional research methods are generally based on full digital...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 郭淑霞高颍刘宁李瑛宋阳刘琦陈卫军李南京韩前进
Owner NORTHWESTERN POLYTECHNICAL UNIV
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