A Proposal of Overfill CDM Transmission Scheme for Future Road-Vehicle Communication Systems(Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
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概要
- 論文の詳細を見る
In order to realize a future seamless high-speed road-vehicle communication system, we have proposed using code division multiplexing (CDM) radio transmission scheme by using cyclic shifted-and-extended (CSE) codes as spread codes. As the CSE codes are generated by cyclically shifting and extending a conventionally used code, the number of codes generated from a code is limited to the length of the shift interval and the tolerable period of delayed waves also depends on the length. In this paper, based on CSE codes, we propose a method to minimize the length of the shift interval and a cancellation technique with a simple calculation in order to eliminate the interference from delayed waves caused by the reduction of the length of shift interval. The concept and the BER performances in AWGN, two-paths, and multi-path fading environments are described in this paper. As a result, the maximum transmission rate of CSE-based-CDM transmission per one-code using the newly proposed transmission scheme is 3 times as large as that using conventional CSE codes and DQPSK-CDM transmission scheme.
- 社団法人電子情報通信学会の論文
- 2003-01-01
著者
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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
Communications Research Laboratory, Incorporated Administrative Agency
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FUJISE Masayuki
Communications Research Laboratory
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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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Fujise M
Wireless Communications Laboratory National Institute Of Information And Communications Technology
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Shimezawa Kazuyuki
Graduate School Of Science And Engineering Chuo University:(present Office)advanced Telecommunicatio
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Harada Hiroshi
Communications Research Laboratory Independent Administrative Institution
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