Cyclic Shifted-and-Extended Codes Based on a Quasi-Orthogonal Sequence for a CDM Transmission Scheme(Transmission Systems and Transmission Equipment for Communications)
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概要
- 論文の詳細を見る
We have developed a code-division-multiplexing (CDM) transmission scheme for future road-vehicle communication systems, which uses cyclic shifted-and-extended (CSE) codes generated from a basic code with superior auto-correlation characteristics. This paper proposes to use a Quasi-Orthogonal (QO) sequence as the basic code. Its auto-correlation values are zero except at zero and middle shifts. When the CDM transmission is performed by the CSE codes based on the QO sequence, a desired correlation value is, at a receiver, interfered by the auto-correlation value at middle shift. Therefore, an elimination technique for the interfered correlation value is proposed and realizes zero cross-correlation characteristics within the cyclical shift interval. The new CDM transmission scheme based on the proposed scheme is evaluated by computer simulations in terms of the bit-error-rate performance.
- 社団法人電子情報通信学会の論文
- 2006-11-01
著者
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HARADA Hiroshi
National Institute of Information and Communications Technology (NICT)
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Shirai H
Naka Fusion Research Establishment Japan Atomic Energy Research Institute
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Harada H
New Generation Wireless Communications Research Center National Institute Of Information And Communi
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Harada Hiroshi
National Inst. Of Information And Communications Technol. (nict) Kanagawa Jpn
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Harada Hiroshi
National Institute Of Information And Communications Technology
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Shirai Hiroshi
Graduate School Of Engineering University Of Hyogo
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Harada H
Laboratory Of Medicinal Plant Science Tokyo University Of Pharmacy And Life Science School Of Pharma
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SHIMEZAWA Kazuyuki
Graduate School of Science and Engineering, Chuo University
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Shimezawa Kazuyuki
Graduate School Of Science And Engineering Chuo University:(present Office)advanced Telecommunicatio
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Harada Hiroshi
National Insitute Of Information And Communication Technology
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