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《超短波跳頻數(shù)傳電臺(tái)鏈路設(shè)計(jì)和實(shí)現(xiàn)》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、摘要超短波跳頻數(shù)傳電臺(tái)具有良好的抗干擾能力和保密能力,在民用及特殊環(huán)境通信中都有著廣泛的應(yīng)用。設(shè)計(jì)并實(shí)現(xiàn)超短波跳頻數(shù)傳電臺(tái)仿真軟件,對(duì)超短波跳頻電臺(tái)的研發(fā)具有重要的工程應(yīng)用價(jià)值。本文根據(jù)用戶需求,在深入進(jìn)行需求和相關(guān)技術(shù)指標(biāo)分析的基礎(chǔ)上,給出了超短波跳頻數(shù)傳電臺(tái)鏈路仿真軟件的總體設(shè)計(jì)方案,該方案能夠支持多種信道編碼、調(diào)制方式和適合山區(qū)、丘陵等信道環(huán)境。論文的重點(diǎn)在于跳頻同步、信道建模以及相關(guān)指標(biāo)評(píng)估等方面。工作的關(guān)鍵在于跳頻同步、信道建模以及相關(guān)指標(biāo)的評(píng)估三方面。本文采用將TOD信息作為同步字頭的方法實(shí)現(xiàn)跳頻同步,主要闡述該方法的原理及關(guān)鍵步驟;結(jié)合丘陵地帶超短波信號(hào)的傳播特
2、點(diǎn)和跳頻通信的特點(diǎn),完成了鏈路信道的仿真建模;根據(jù)用戶要求的評(píng)估指標(biāo),給出了各指標(biāo)的測試與評(píng)估方法,并設(shè)計(jì)了相應(yīng)的仿真測試模塊。最后在ADS仿真軟件和Matlab上,實(shí)現(xiàn)了超短波跳頻數(shù)傳電臺(tái)鏈路仿真軟件。該仿真軟件能夠?qū)φ`比特率、解調(diào)輸出信噪比、頻譜圖、誤差向量幅度值和信道衰落深度等進(jìn)行評(píng)估與分析。論文對(duì)超短波跳頻數(shù)傳電臺(tái)鏈路仿真軟件進(jìn)行了測試,測試結(jié)果表明:該仿真軟件滿足用戶提出的所有要求,現(xiàn)已交付用戶使用。關(guān)鍵字:超短波跳頻擴(kuò)頻通信鏈路ADS超短波跳頻數(shù)傳電臺(tái)鏈路的設(shè)計(jì)與實(shí)現(xiàn)AbstractWithwellanti-interferenceabilityandsecure
3、ability,theUltrashortwaveFHSSdata-transmittedradioiswidelyusedinbonlcivilandspecialcommunication.DesignandimplementationoftheUltrashortwaveFHSSdata-transmittedr.a(chǎn)diosimulativesoftwarehasimportantengineeringandappliedvalueintheresearchanddevelopmentoftheUltrashortwaveFHSSdata-transmittedradi
4、o.Accordingtothedemandsoftheusersandinthebaseofdeeplyanalyzingthedemandsandthetechnicalnorms,thispapershowstheoveralldesignedproposalofthesoftware.Theproposalcallprovidemanymethodsofmodulationandchannelcoding,andsuitsthechannelenvironmentofthehillyareas.Thefocalpointsofthispaperlieinthemeth
5、odofFHSSsynchronization,modelingofthechannelsandevaluationofthenorms,ete.ThispaperusessynchronizedmethodwhichmgardsTODinformationasthesynchronoushead,mainlyexpoundsprincipalandkeystepsofthismethod.CombiningthefeaturesofthefrequencyhoppingcommunicationandtheUltrashortwavesignalwhichtransmits
6、inhillyareas,thechannelsofthelinkaresimulatedandmodeled.Accordingtotheevaluatednormswhichtheusersneed,thetestedandevaluatedmethodsofthenormsareshowedandrelevantmodulesofsimulationandtestaredesigned.Last,thesimulativesoftwareoftheUltrashortwaveFHSSdata-transmittedradiolinkisimplementedbyADSa
7、ndMatlab.ThesimulativesoftwareCanevaluateandanalyzeBER,SNRafterdemodulating,frequencyspectrum,EVMandthechannelfadedepth,etc.11lesimulativesoftwareoftheUltrashortwaveFHSSdata-transmittedradiolinkhasbeentestedinthispaper.Theresultsofthetestindicatethatthes