New Quasi-Synchronous Sequences for CDMA Slotted ALOHA Systems
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概要
- 論文の詳細を見る
One of unique features of CDMA slotted ALOHA (CDMA S-ALOHA) is that user must synchronize his transmission to give slot. thus orthogonal sequence as spreading sequence would achieve ideal throughput if each of packets accomplish perfect synchronization. In ths presence of any ambiguity in synchronizations, however, quasi-synchronous (QS) sequences suit well with CDMA S-ALOHA system. In this paper, we introduce new QS-sequences obtained from the orthogonal Gold sequences and discuss their performance when applying to CDMA S-ALOHA systems. As a result, withstanding to access timing error, good performance is ensured with this sequence under the environment of AWGN, MAI (multiple access interference) and frequency non-selective fading, that is, micro or pico cellular systems and indoor wireless LANs.
- 社団法人電子情報通信学会の論文
- 1998-11-25
著者
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Makido S
The School Of Engineering Nagoya University:(present Address)toyota Central R&d Labs. Inc.
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Yamazato T
Nagoya Univ. Nagoya Jpn
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Saito Masato
Nara Inst. Of Sci. And Technol. Ikoma‐shi Jpn
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OGAWA Akira
Graduate School of Pharmaceutical Sciences, Hokkaido University
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Ogawa Akira
The Department Of Information Engineering Meijo University
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YAMAZATO Takaya
the Center for Information Media Studies, Nagoya University
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SAITO Masato
the Graduate School of Engineering, Nagoya University
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KATAYAMA Masaaki
the Graduate School of Engineering, Nagoya University
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Saito Miki
The School Of Engineering Nagoya University:(present Address)toyota Central R&d Labs. Inc.
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Sawada Manabu
Research Laboratories Denso Corporation:department Of Electrical Engineering And Computer Science Gr
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Katayama M
Ecotopia Science Institute Nagoya University
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Ogawa Akira
Graduate School Of Pharmaceutical Sciences Hokkaido University
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