本文選題：UAV + 無線圖傳數(shù)據(jù)鏈��； 參考：《國(guó)防科學(xué)技術(shù)大學(xué)》2014年碩士論文

【摘要】：當(dāng)前,社會(huì)信息化不斷推進(jìn)、通信結(jié)構(gòu)日趨多元,現(xiàn)有的地面通信和衛(wèi)星通信等技術(shù)手段已無法滿足人們?nèi)找嬖鲩L(zhǎng)的需求,機(jī)載通信正逐步成為立體化信息系統(tǒng)的一種重要增補(bǔ)和支援。隨著無線通信和多媒體技術(shù)在下一代UAV無線圖傳數(shù)據(jù)鏈系統(tǒng)中的集成,對(duì)系統(tǒng)容量和服務(wù)質(zhì)量的需求正在不斷提升。如何提高數(shù)據(jù)傳輸?shù)挠行院涂煽啃�、降低BER,已成為當(dāng)前無線通信領(lǐng)域研究的熱點(diǎn)。將MIMO技術(shù)與OFDM技術(shù)相結(jié)合,或?qū)C-FDE技術(shù)與SC-CPM技術(shù)相結(jié)合均可很好地滿足上述需求。然而,在動(dòng)態(tài)、多徑條件下的頻率選擇性衰落信道中,ISI、ICI等因素對(duì)系統(tǒng)性能的影響非常嚴(yán)重,因此有效的均衡技術(shù)已成為基于UAV平臺(tái)的無線圖傳數(shù)據(jù)鏈系統(tǒng)設(shè)計(jì)的關(guān)鍵。針對(duì)常規(guī)方法在惡劣通信環(huán)境下計(jì)算復(fù)雜度較大、功率效率和頻譜效率較低等缺點(diǎn),本文從MIMO-OFDM與SC-FDE SC-CPM兩條技術(shù)路線出發(fā),提出了新型、高效的基于UAV平臺(tái)的無線圖傳數(shù)據(jù)鏈系統(tǒng)的均衡技術(shù)方案:一、通過分析MIMO-OFDM UAV無線圖傳數(shù)據(jù)鏈的系統(tǒng)模型,提出了一種球形均衡技術(shù)的內(nèi)協(xié)同優(yōu)化方案。通過在初始搜索半徑、檢測(cè)順序以及枚舉策略等方面進(jìn)行多重優(yōu)化,并支持相關(guān)參數(shù)的可配置,在一定程度上降低了系統(tǒng)的計(jì)算復(fù)雜度。二、在前述基礎(chǔ)上,提出了一種球形均衡技術(shù)的外聯(lián)合優(yōu)化方案。該方案將微量子遺傳算法嵌入球形均衡技術(shù),兼并量子計(jì)算和遺傳算法的優(yōu)點(diǎn)。此外,通過將多維搜索歸納為單維搜索,避免了大量繁雜的矩陣運(yùn)算,提高了檢測(cè)效率。三、提出了一種低復(fù)雜度SC-FDE SC-CPM技術(shù)。該技術(shù)將SCCC技術(shù)與CPM技術(shù)相結(jié)合,有效消除了ISI和ICI,獲得了比Turbo碼更優(yōu)異的性能;同時(shí),在每個(gè)數(shù)據(jù)包中嵌入導(dǎo)頻訓(xùn)練字序列,用于信道估計(jì);引入M進(jìn)制Laurent分解方法,以進(jìn)行低復(fù)雜度MMSE頻域均衡。四、通過權(quán)衡前述兩條均衡技術(shù)路線在UAV無線圖傳數(shù)據(jù)鏈系統(tǒng)中應(yīng)用的利弊,提出了一種基于SC-FDE SC-CPM的低復(fù)雜度UAV均衡器的軟硬件協(xié)同設(shè)計(jì)與優(yōu)化方案。該方案將SC-FDE技術(shù)與SC-CPM技術(shù)相結(jié)合,在抵抗多徑效應(yīng)的同時(shí),提高頻譜、功率利用率;此外,通過對(duì)均衡器在算法和體系結(jié)構(gòu)兩個(gè)方面進(jìn)行協(xié)同設(shè)計(jì)與優(yōu)化,并引入可配置的均衡系數(shù),大幅降低了系統(tǒng)的計(jì)算復(fù)雜度,提高了檢測(cè)效率與復(fù)雜環(huán)境適應(yīng)能力�？傮w而言,本文的主要研究工作聚焦于UAV無線圖傳數(shù)據(jù)鏈系統(tǒng)均衡技術(shù)的軟硬件協(xié)同設(shè)計(jì)與多重優(yōu)化,對(duì)于我國(guó)UAV無線圖傳數(shù)據(jù)鏈系統(tǒng)均衡技術(shù)的發(fā)展和國(guó)內(nèi)外相關(guān)領(lǐng)域的研究具有十分重要的借鑒意義與應(yīng)用價(jià)值。
[Abstract]:At present, with the continuous development of social informatization and the increasing diversity of communication structure, the existing technical means such as terrestrial communications and satellite communications can no longer meet the increasing needs of people.Airborne communication is becoming an important supplement and support for three-dimensional information system.With the integration of wireless communication and multimedia technology in the next generation UAV wireless graphic data link system, the demand for system capacity and quality of service is increasing.How to improve the efficiency and reliability of data transmission and reduce Bert has become a hot topic in the field of wireless communication.The combination of MIMO technology and OFDM technology, or SC-FDE technology and SC-CPM technology can well meet the above requirements.However, in frequency selective fading channels under dynamic and multipath conditions, such factors as ISI ICI have a very serious impact on the system performance. Therefore, effective equalization technology has become the key to the design of wireless graphic data link system based on UAV platform.In view of the disadvantages of the conventional method in the bad communication environment, such as high computational complexity, low power efficiency and spectrum efficiency, this paper proposes a new type of method based on the two technical routes of MIMO-OFDM and SC-FDE SC-CPM.An efficient equalization scheme for wireless graphic data link system based on UAV platform is presented. Firstly, by analyzing the system model of MIMO-OFDM UAV wireless graphic data link, a spherical equalization scheme is proposed.By optimizing the initial search radius, detection sequence and enumeration strategy, and supporting the configuration of the related parameters, the computational complexity of the system is reduced to a certain extent.Secondly, on the basis of the above mentioned, a scheme of external joint optimization of spherical equalization technique is proposed.The scheme embed the microelement genetic algorithm into the spherical equalization technique, merging the advantages of quantum computation and genetic algorithm.In addition, the multi-dimensional search is reduced to one-dimensional search, which avoids a large number of complicated matrix operations and improves the detection efficiency.Thirdly, a low complexity SC-FDE SC-CPM technique is proposed.This technique combines SCCC technology with CPM technology, effectively eliminates ISI and ICI, and achieves better performance than Turbo code. At the same time, pilot training word sequences are embedded in each packet for channel estimation. M-ary Laurent decomposition method is introduced.In order to achieve low complexity MMSE frequency domain equalization.Fourthly, by weighing the advantages and disadvantages of the above two equalization techniques in UAV wireless graphic data link system, a hardware / software co-design and optimization scheme of low complexity UAV equalizer based on SC-FDE SC-CPM is proposed.The scheme combines SC-FDE technology with SC-CPM technology to improve spectrum and power efficiency while resisting multipath effect. In addition, the equalizer is designed and optimized in two aspects: algorithm and architecture.By introducing configurable equilibrium coefficient, the computational complexity of the system is greatly reduced, and the detection efficiency and adaptability of complex environment are improved.In general, the main work of this paper focuses on the hardware / software co-design and multiple optimization of the equalization technology of UAV wireless graphic data link system.It has very important reference significance and application value for the development of equalization technology of UAV wireless graphic data link system and the research of related fields at home and abroad.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：V279;TN919.3

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