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https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00005601
2023-01-16T04:29:41Z
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New Quasi-Synchronous Sequences for CDMA Slotted ALOHA Systems
Saito, Masato
Yamazato, Takaya
Katayama, Masaaki
Ogawa, Akira
open access
Copyright 1998 IEICE 許諾番号 06RB0162号
CDMA slotted ALOHA system
QS-sequences
access timing error
orthogonal Gold sequences
flat fading channel
One of unique features of CDMA slotted ALOHA(CDMA S-ALOHA)is that user must synchronize his transmission to given slot. Thus orthogonal sequence as spreading sequence would achieve ideal throughput if each of packets accomplish perfect synchronization. In the 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.
IEICE
1998-11
eng
journal article
VoR
http://hdl.handle.net/2237/7207
https://nagoya.repo.nii.ac.jp/records/5601
http://search.ieice.org/bin/summary.php?id=e81-a_11_2274&category=A&year=1998&lang=E&abst=&auth=1
0916-8508
IEICE Transaction on Fundamentals
E81-A
2274
2280
https://nagoya.repo.nii.ac.jp/record/5601/files/E81-A-2274.pdf
application/pdf
761.1 kB
2018-02-19