A New CDM Transmission Scheme with Cyclic Shifted-and-Extended Codes and a Cancellation Technique for Accumulated Cross-Correlation Values(Wireless Communication Technology)
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概要
- 論文の詳細を見る
We have developed a code-division-multiplexing (COM) transmission scheme for future cellular communication systems, which uses cyclic shifted-and-extended (CSE) codes generated from an M-sequence to enable seamless communication in highly mobile environments. Because the correlation characteristics of CSE codes are determined by the M-sequence, the cross-correlation values are accumulated as a result of combining transmitted signals with opposite polarities in parallel channels. The accumulated cross-correlation values significantly degrade transmission performance, especially with multi-level modulation schemes such as quadrature amplitude modulation (QAM). We thus propose a cancellation technique to eliminate the accumulated cross-correlation values. We have evaluated the transmission performance of the CDM transmission scheme with the proposed technique by computer simulation. The new scheme enables high-quality data transmission in fast-fading channels.
- 社団法人電子情報通信学会の論文
- 2004-08-01
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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