The Ubiquitous Society Imagined by NTT Communications Corporation
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Accession number;04A0345741
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| Title;The Ubiquitous Society Imagined by NTT Communications Corporation |
| Author;
KANAMARU TETSUO
(NTT Communications Corp., JPN)
KAWATE HIROAKI
(NTT Communications Corp., JPN)
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Journal Title;ITU Janaru
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Journal Code:L0766A
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ISSN:0916-7544
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VOL.34;NO.5;PAGE.54-56(2004)
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| Figure&Table&Reference;FIG.1, TBL.2 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Though DS-CDMA and MC-CDMA are used as practical modulations for IMT-2000, TD-CDMA is currently interested. NTT Communications Corporation is carrying on with experiments of public multimedia wireless LAN services using TD-CDMA. This article describes technical features of TD-CDMA, that is, TD-CDMA makes bi-directional transmission for up- and downlink on a single carrier frequency, can allocate up- and downlink rate freely, is suitable for internet access, provide possibility of easy controlling because of using the same frequency band for both up- and downlink, and is robust against multipath effect. TD-CDMA will be continued to develop as a basic technology in order to advance ubiquitous network management, one of the important fields of NTT. |
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