【摘要】：面向2020年及未來,第五代無線通信系統(tǒng)(The 5th Generation Mobile Com-munication,5G)將解 決多樣化應(yīng)用場景下差異化性能指標(biāo)帶來的挑戰(zhàn)。從 5G 的主要技術(shù)場景出發(fā),5G不僅需要滿足傳統(tǒng)移動(dòng)通信的多樣化業(yè)務(wù)需求,還需要滿足低時(shí)延高可靠場景的車對車通信和熱點(diǎn)區(qū)域海量大連接場景的毫米波點(diǎn)對點(diǎn)通信的特殊應(yīng)用需求。5G新型應(yīng)用場景的建設(shè)離不開車對車及毫米波點(diǎn)對點(diǎn)通信系統(tǒng)的支撐,而二者通信系統(tǒng)的設(shè)計(jì)則需立足于對典型車對車及毫米波點(diǎn)對點(diǎn)無線信道的深入研究。物理無線信道作為通信發(fā)生的媒介,其特性極大地影響著通信系統(tǒng)的性能。因此,在車對車及毫米波點(diǎn)對點(diǎn)通信系統(tǒng)的設(shè)計(jì)中,需要用信道模型對復(fù)雜的無線信道加以描述。盡管人們已經(jīng)對車對車及毫米波點(diǎn)對點(diǎn)無線信道建模理論與方法開展了大量研究,但是現(xiàn)有研究仍然存在下述局限:從科學(xué)研究上看,現(xiàn)階段針對車對車及毫米波點(diǎn)對點(diǎn)無線信道的研究無法揭示相關(guān)場景下電波傳播的基本規(guī)律;從建模理論與方法上看,現(xiàn)階段針對車對車及毫米波點(diǎn)對點(diǎn)無線信道建模理論與方法的研究還不足以為系統(tǒng)設(shè)計(jì)者提供完整的信道模型庫。針對上述問題,本文圍繞車對車及毫米波點(diǎn)對點(diǎn)通信場景的無線信道建模理論與方法進(jìn)行了綜合性的研究。本文主要工作如下:1)車對車通信場景時(shí)變非平穩(wěn)相關(guān)散射信道建模:針對車對車無線信道時(shí)變非平穩(wěn)的特點(diǎn),基于一階二狀態(tài)馬爾科夫鏈,提出了車對車時(shí)變非平穩(wěn)信道模型,描述車對車無線信道的多徑生滅過程;針對車對車無線信道相關(guān)散射的特點(diǎn),以Cholesky分解為基礎(chǔ),提出高斯、韋伯和均勻分布相關(guān)系數(shù)之間的轉(zhuǎn)換關(guān)系,建立了車對車相關(guān)散射信道模型,彌補(bǔ)了相關(guān)信道建模理論研究的不足;以實(shí)際測量數(shù)據(jù)為基礎(chǔ),驗(yàn)證了車對車時(shí)變非平穩(wěn)相關(guān)散射信道模型的準(zhǔn)確性。2)車對車通信場景三維散射體簇信道建模:針對車對車無線信道散射體快速時(shí)變的特點(diǎn),以泊松分布的散射體簇為基礎(chǔ),提出可視區(qū)域的概念,建立了車對車時(shí)變非平穩(wěn)信道模型,描述車對車無線信道的散射體簇動(dòng)態(tài)變化過程;針對車對車無線信道散射體簇建模理論研究的不足,以電波傳播的多徑幾何結(jié)構(gòu)為出發(fā)點(diǎn),建立了車對車多輸入多輸出(Multiple-Input Multiple-Output,MIMO)信道模型,促進(jìn)了車對車動(dòng)態(tài)信道建模理論的進(jìn)一步發(fā)展;以實(shí)際測量數(shù)據(jù)為基礎(chǔ),驗(yàn)證了車對車三維散射體簇信道模型的準(zhǔn)確性。3)毫米波點(diǎn)對點(diǎn)通信場景衰落信道建模和色散信道建模:針對毫米波點(diǎn)對點(diǎn)無線信道電波傳播特性研究的不足,開展了30 GHz頻段、1 GHz超寬帶,室內(nèi)和室外場景的毫米波點(diǎn)對點(diǎn)無線信道測量,建立了毫米波點(diǎn)對點(diǎn)室內(nèi)和室外場景衰落信道模型;針對毫米波點(diǎn)對點(diǎn)無線信道時(shí)域和空域特性研究的不足,采用旋轉(zhuǎn)接收天線的測量方式掃描不同方向的水平接收信號,萃取時(shí)域和空域典型信道參數(shù),建立了毫米波點(diǎn)對點(diǎn)室內(nèi)和室外場景色散信道模型,提升了信道參數(shù)萃取以及模型建立的科學(xué)性。4)毫米波點(diǎn)對點(diǎn)通信場景規(guī)則幾何信道建模:針對毫米波點(diǎn)對點(diǎn)無線信道幾何建模理論研究的不足,提出了二維雙圓幾何模型,描述毫米波點(diǎn)對點(diǎn)無線信道二維分布的散射體;在此基礎(chǔ)上,進(jìn)而提出了三維雙圓柱和三維雙球規(guī)則幾何模型,建立了毫米波點(diǎn)對點(diǎn)MIMO信道模型;深入研究了毫米波點(diǎn)對點(diǎn)無線信道空時(shí)相關(guān)特性,為后續(xù)毫米波點(diǎn)對點(diǎn)無線信道模型的擴(kuò)展和應(yīng)用奠定了理論基礎(chǔ)。綜上所述,本文圍繞車對車及毫米波點(diǎn)對點(diǎn)無線信道建模理論與方法開展了研究。在研究對象層面為車對車及毫米波點(diǎn)對點(diǎn)通信在5G中的應(yīng)用提供了電波傳播預(yù)測工具;在方法論層面為不同場景中的無線信道建模提供了可移植和轉(zhuǎn)化的方法;在應(yīng)用層面為車對車及毫米波點(diǎn)對點(diǎn)通信系統(tǒng)的網(wǎng)絡(luò)規(guī)劃、信息可靠傳輸?shù)於嘶A(chǔ)。
[Abstract]:In the 2020 and the future, the fifth generation wireless communication system (The 5th Generation Mobile Com-munication, 5G) will solve the challenge of differential performance indicators in the diversified application scenario. From the main technical scene of 5G, 5G not only needs to meet the diversity of traditional mobile communications, but also needs to meet the low delay and high reliability. The special application of the scene car to the vehicle communication and the large mass connection scene of the hot area, the millimeter wave point to point communication,.5G new application scene is built on the support of the car and the millimeter wave point to point communication system, while the design of the two communication system should be based on the typical car pair and the millimeter wave point to point wireless channel. The characteristics of the physical wireless channel, as the medium of communication, greatly affect the performance of the communication system. Therefore, in the design of the vehicle and the millimeter point to point communication system, the channel model needs to be used to describe the complex wireless channel. Although the vehicle and the millimeter wave point to point wireless channel are built. Model theory and method have carried out a lot of research, but the existing research still has the following limitations: from the scientific research, the research on car to car and millimeter wave point to point wireless channel can not reveal the basic rules of radio wave propagation in the related scene at present. From the modeling theory and square method, the current stage is aimed at car to car and millimeter wave point pair. The research on the theory and method of point wireless channel modeling is not sufficient to provide a complete channel model library for the system designers. In this paper, the theory and method of wireless channel modeling for car to vehicle and millimeter point to point communication scene are comprehensively studied in this paper. The main work of this paper is as follows: 1) the time change of vehicle communication scene is changed. Nonstationary correlation scattering channel modeling: Based on the characteristic of vehicle to vehicle wireless channel, based on the first order two state Markoff chain, a vehicle to vehicle time-varying non stationary channel model is proposed to describe the multipath generation and death process of the vehicle to the vehicle wireless channel. Based on the characteristics of the car to vehicle radio channel correlation scattering, the Cholesky decomposition is proposed. Based on the transformation relationship between Gauss, Webb and the uniform distribution correlation coefficient, the model of vehicle to vehicle correlation scattering channel is established, which makes up for the insufficiency of the related channel modeling theory. Based on the actual measurement data, the accuracy of the vehicle's time-varying non stationary correlation scattering channel model.2) is verified. Channel modeling: in view of the fast and time-varying characteristics of the vehicle's wireless channel scatterer, based on the Poisson distributed scatterer cluster, the concept of the visible region is proposed. The time-varying non stationary channel model of car to car is established, and the dynamic change process of the scatterer cluster in the vehicle's wireless channel is described, and the theory of the vehicle to the vehicle's wireless channel scatterers is modeled. Based on the multipath geometric structure of the wave propagation, the model of Multiple-Input Multiple-Output (MIMO) channel is established, which promotes the further development of the vehicle dynamic channel modeling theory. Based on the actual measurement data, the model of the vehicle's three-dimensional scattering cluster channel model is verified. .3) millimeter wave point to point communication scene fading channel modeling and dispersion channel modeling: Aiming at the shortage of radio wave propagation characteristics of millimeter point to point wireless channel, 30 GHz frequency band, 1 GHz ultra wideband, indoor and outdoor millimeter wave point to point wireless channel measurement are carried out, and the attenuation of indoor and outdoor scene of millimeter wave point is established. In view of the shortage of the time domain and airspace characteristics of the millimeter wave point to point wireless channel, it uses the rotating receiving antenna to scan the horizontal receiving signals in different directions, extracts the typical channel parameters in the time domain and the airspace, and establishes a scattering channel model of the millimeter wave point to point indoor and ventricular outfield, and improves the channel parameter extraction. The scientific.4 model established by the model) modeling of regular geometry channel of millimeter point to point communication scene: Aiming at the shortage of geometric modeling theory of millimeter wave point to point wireless channel, a two-dimensional double circular geometric model is proposed to describe the two-dimensional distribution of the millimeter wave point to point wireless channel. On this basis, the three-dimensional double circle is proposed. The millimeter wave point to point MIMO channel model is established by the column and the three-dimensional double sphere rule geometric model, and the space-time correlation characteristics of the millimeter wave point to point wireless channel are deeply studied. It lays the theoretical foundation for the extension and application of the follow-up millimeter wave point to point wireless channel model. In summary, this paper focuses on the vehicle and the millimeter wave point to point wireless channel. Modeling theory and method have been studied. At the level of research object, it provides an electric wave propagation prediction tool for vehicle and millimeter wave point to point communication in 5G, and provides a portable and transformation method for wireless channel modeling in different scenarios; at the application level, it is the train to car and millimeter wave point on point communication system. Unified network planning lays the foundation for reliable transmission of information.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

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