直升機(jī)起降中無(wú)線紫外光噴泉碼引導(dǎo)方法研究
doi: 10.11999/JEIT150004 cstr: 32379.14.JEIT150004
基金項(xiàng)目:
國(guó)家自然科學(xué)基金委員會(huì)-中國(guó)民航局民航聯(lián)合研究基金(U1433110),陜西省科技計(jì)劃工業(yè)公關(guān)項(xiàng)目(2014K05-18),陜西省教育廳產(chǎn)業(yè)化培育項(xiàng)目(2013JC09),西安市科學(xué)計(jì)劃項(xiàng)目(CXY1435(4))和西安市碑林區(qū)科技計(jì)劃項(xiàng)目(GX1302)
Research on Wireless Ultraviolet Guiding Fountain Code Technology of Helicopter Emergency Landing
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摘要: 為了提高直升機(jī)在應(yīng)急無(wú)線紫外光通信輔助起降中信標(biāo)搜尋、定位降落的效率和可靠性,該文提出一種基于噴泉(LT)碼的分等級(jí)編碼通信方案,采用不同等級(jí)編碼的分級(jí)方法設(shè)計(jì)了不同場(chǎng)景、不同引導(dǎo)階段的通信策略,分析了高丟包率信道環(huán)境中變化刪除概率下的誤比特率,并與其他傳統(tǒng)信道編碼進(jìn)行了比較。實(shí)驗(yàn)仿真結(jié)果表明,在二進(jìn)制刪除信道下,該分等級(jí)編碼方法可顯著降低LT碼的誤比特率,提高了編譯碼性能;該通信策略適用于高丟包率信道環(huán)境,能獲得更好的通信效果,提高了直升機(jī)應(yīng)急輔助起降的安全性。Abstract: In order to improve the efficiency and the reliability of the helicopter guiding in the beacon researching and locate landing, an encoding communication scheme based on unequal level coding Luby Transform (LT) code is proposed. Different communication strategies are proposed for different scenarios. The different guiding strategies considering the unequal level coding scheme are designed. The bit error rate of the unequal level coding LT code with different communication strategies is analyzed. The coding scheme and communication strategy are simulated by computer. The simulation results show that the bit error rate of the unequal level protection encoding scheme is significantly reduced and the coding performance is improved over binary erasure channel. The strategies can adapt to different channel environments, and the reliability of communication is improved. Thus, helicopter emergency landing safety is improved.
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Key words:
- Ultraviolet communication /
- Fountain code /
- Helicopter landing guiding /
- Guiding method
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