Cell Search Time Comparison Using Hierarchical and Non-hierarchical Synchronization Channels in OFDM Based Evolved UTRA Downlink
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概要
- 論文の詳細を見る
This paper presents a comparison of hierarchical and non-hierarchical synchronization channel (SCH) structures in terms of the initial cell search time and neighboring cell search time in order to establish the optimum SCH structure in the Evolved UTRA downlink. Computer simulation results show that in a 19-cell configuration, the cell search time at 90% in the cumulative distribution function (CDF) using the hierarchical SCH structure is less than half that using the non-hierarchical SCH structure in a neighboring cell search under low signal-to-interference plus noise power ratio (SINR) conditions, although both structures achieve almost the same cell search time in the initial cell search. This is due to the cross-correlation based SCH symbol timing detection in the hierarchical SCH structure, which is affected less by noise than the auto-correlation based detection in the non-hierarchical SCH structure. Thus, we conclude that the hierarchical SCH structure is superior to the non-hierarchical SCH structure based on the cell search time performance especially in the neighboring cell search.
- 2009-05-01
著者
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TANNO Motohiro
Radio Access Network Development Department, NTT DOCOMO, INC.
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KISHIYAMA Yoshihisa
Radio Access Network Development Department, NTT DOCOMO, INC.
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HIGUCHI Kenichi
Department of Electrical Engineering, Tokyo University of Science
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SAWAHASHI Mamoru
Department of Information Network Engineering, Musashi Institute of Technology
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NAGATA Satoshi
Radio Access Network Development Department, NTT DOCOMO, INC.
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Higuchi K
Wireless Research Laboratories Ntt Docomo Inc.
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Higuchi K
Department Of Electrical Engineering Tokyo University Of Science
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Sawahashi Mamoru
Department Of Electrical Engineering Tokyo University Of Science
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Kishiyama Yoshihisa
Radio Access Network Development Department Ntt Docomo Inc.
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Kishiyama Yoshihisa
Wireless Laboratories Ntt Do Como Inc.
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Higuchi Kenichi
Department Of Electrical Engineering Tokyo University Of Science
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Nagata Satoshi
Radio Access Network Development Department Ntt Docomo Inc.
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Tanno Motohiro
Radio Access Network Development Department Ntt Docomo Inc.
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Kakura Yoshikazu
Radio Access Network Development Department Ntt Docomo Inc.
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Nagata Satoshi
Radio Access Network Development Department NTT DOCOMO INC
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Kishiyama Yoshihisa
Radio Access Network Development Department NTT DOCOMO INC
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