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We need new and reliabletechnology to prevent traffic accidents but also to improve the smooth drivingby reducing interference between different vehicular communications on theroad and by minimizing possible collision.Recent research progress, both in academy and industry, in the vehiculartechnology field tends to develop more intelligent vehicles through the use ofnew technologies in wireless communication. Vehicle-to-vehicle communica-tion system was made possible. As for that, the cars can exchange among themdifferent information such as vehicle velocity, driver intention, information onroad traffic and so on. Moreover, vehicles can be equipped with ranging systemsuch as radar which can range distance among other vehicles. Since IR-UWBsignals have very short duration pulses, they provide very accurate rangingcapability in short range radio propagation environment. Using variable lengthof spreading sequence system in DS-UWB could improve the precision and reli-ability of ranging and reduce the processing speed. Moreover, UWB technologycan improve high-speed communication system. It is equally important to rangeand communicate at the same time. Combining radar and communication isnot an easy task. Significant works have been done in this area such as apply-ing spread spectrum techniques, however, communication and ranging requiresequence with different periods of the spreading code.Our research proposes a system where a vehicle is expected to communicate and range distance among surrounding vehicles at the same time. Equippinga vehicle with radar and communication capability is not efficient and costeffective. Therefore, after analyzing the optimum packet structure for radarand communication based ranging independently, we design a communicationprotocol and DS-UWB based packet structure to integrate radar and communi-cation. The scheme uses a switched packet stucture modified by using variablelength of spreading sequence. Variable length of spreading code is to adjust therequired spreading code length with respect to the estimated inter-vehicular dis-tance. We jointly optimize the overall system performance by getting extra gainthrough synergy effect of radar and communication. We evalutate the rangingperformance in term of accuracy, we analyze the communication performancethrough BER and throughput calculation. In addition to ranging accuracy, thepacket design is another important parameter of the UWB ranging, becauseshort preamble in the packet, range estimates can be obtained quickly and alsomore resources can be allocated for data transmission if the system is perform-ing both ranging and communications. Intuitively, as the preamble ratio in apacket increases, more accurate range (TOA) estimation can be performed. Thesimulation results demonstrate that the proposed integrated system minimizesthe ranging error while maintaining reliable communication with acceptabledata rate.Moreover, we investigate on the security issues of vehicular communicationand present the possibility of usingUWBwireless channel as a common mediumto generate keys for inter-vehicle authentication. By a proper quantization ofthe UWB channel impulse response, mutual information depending highly onpropagation environment and SNR of each propagation path can be generated.Besides, authentication beneficiates from the temporal process of the channelimpulse response because the variation is strongly correlated in time. However, the time variation can increase uncertainty to authenticate legitimate userswhich should be analyzed carefully.Finally, we show that using OMF with variable length of spreading codecan combat interference from oncoming vehicles or intentional jammers. 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Integrated Radar and Communication Using DS-UWB for Safety Driving against Collision and Interference
http://hdl.handle.net/10131/8539
http://hdl.handle.net/10131/8539833cb7ba-d6ab-4e78-ae94-8f90f018d600
名前 / ファイル | ライセンス | アクション |
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randrianandraina_holitiana_macha-thesis.pdf (6.6 MB)
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randrianandraina_holitiana_macha-review.pdf (55.7 kB)
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Item type | 学位論文 / Thesis or Dissertation(1) | |||||
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公開日 | 2014-05-13 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Integrated Radar and Communication Using DS-UWB for Safety Driving against Collision and Interference | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||
資源タイプ | doctoral thesis | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
Holitiana, Macha Randrianandraina
× Holitiana, Macha Randrianandraina |
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著者(ヨミ) | ||||||
識別子Scheme | WEKO | |||||
識別子 | 21732 | |||||
姓名 | ホリテイアナ, マシャ ランドリアナンドレナ | |||||
著者所属 | ||||||
Department of Physics, Electrical and Computer Engineering, Graduate School of Engineering, Yokohama National University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In the present time, due to the increase of vehicle and pedestrian traffic,danger of traffic accidents has increased extremely. We need new and reliabletechnology to prevent traffic accidents but also to improve the smooth drivingby reducing interference between different vehicular communications on theroad and by minimizing possible collision.Recent research progress, both in academy and industry, in the vehiculartechnology field tends to develop more intelligent vehicles through the use ofnew technologies in wireless communication. Vehicle-to-vehicle communica-tion system was made possible. As for that, the cars can exchange among themdifferent information such as vehicle velocity, driver intention, information onroad traffic and so on. Moreover, vehicles can be equipped with ranging systemsuch as radar which can range distance among other vehicles. Since IR-UWBsignals have very short duration pulses, they provide very accurate rangingcapability in short range radio propagation environment. Using variable lengthof spreading sequence system in DS-UWB could improve the precision and reli-ability of ranging and reduce the processing speed. Moreover, UWB technologycan improve high-speed communication system. It is equally important to rangeand communicate at the same time. Combining radar and communication isnot an easy task. Significant works have been done in this area such as apply-ing spread spectrum techniques, however, communication and ranging requiresequence with different periods of the spreading code.Our research proposes a system where a vehicle is expected to communicate and range distance among surrounding vehicles at the same time. Equippinga vehicle with radar and communication capability is not efficient and costeffective. Therefore, after analyzing the optimum packet structure for radarand communication based ranging independently, we design a communicationprotocol and DS-UWB based packet structure to integrate radar and communi-cation. The scheme uses a switched packet stucture modified by using variablelength of spreading sequence. Variable length of spreading code is to adjust therequired spreading code length with respect to the estimated inter-vehicular dis-tance. We jointly optimize the overall system performance by getting extra gainthrough synergy effect of radar and communication. We evalutate the rangingperformance in term of accuracy, we analyze the communication performancethrough BER and throughput calculation. In addition to ranging accuracy, thepacket design is another important parameter of the UWB ranging, becauseshort preamble in the packet, range estimates can be obtained quickly and alsomore resources can be allocated for data transmission if the system is perform-ing both ranging and communications. Intuitively, as the preamble ratio in apacket increases, more accurate range (TOA) estimation can be performed. Thesimulation results demonstrate that the proposed integrated system minimizesthe ranging error while maintaining reliable communication with acceptabledata rate.Moreover, we investigate on the security issues of vehicular communicationand present the possibility of usingUWBwireless channel as a common mediumto generate keys for inter-vehicle authentication. By a proper quantization ofthe UWB channel impulse response, mutual information depending highly onpropagation environment and SNR of each propagation path can be generated.Besides, authentication beneficiates from the temporal process of the channelimpulse response because the variation is strongly correlated in time. However, the time variation can increase uncertainty to authenticate legitimate userswhich should be analyzed carefully.Finally, we show that using OMF with variable length of spreading codecan combat interference from oncoming vehicles or intentional jammers. Amodified OMF is proposed to solve the interference problem in inter-vehiclecommunication environment. The proposed system is composed of blocks ofOMF that can be switched adaptively according to the change in the lengthof spreading code the user is using. This new OMF scheme differs from theconventional one by solving the issues related to the use of variable length ofspreading code. | |||||
書誌情報 |
発行日 2014-03-26 |
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著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
その他のタイトル | ||||||
その他のタイトル | 安全運転のための衝突や干渉対策のDS-UWBに基づくレーダーと通信の統合に関する研究 | |||||
国立国会図書館分類 | ||||||
主題Scheme | NDLC | |||||
主題 | UT51 | |||||
学位名 | ||||||
学位名 | 博士(工学) | |||||
学位授与機関 | ||||||
学位授与機関識別子Scheme | kakenhi | |||||
学位授与機関識別子 | 12701 | |||||
学位授与機関名 | 横浜国立大学 | |||||
学位授与年月日 | ||||||
学位授与年月日 | 2014-03-26 | |||||
学位授与番号 | ||||||
学位授与番号 | 甲第429号 |