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Titolo:
NEW QUASI-SYNCHRONOUS SEQUENCES FOR CDMA SLOTTED ALOHA SYSTEMS
Autore:
SAITO M; YAMAZATO T; KATAYAMA M; OGAWA A;
Indirizzi:
NAGOYA UNIV,GRAD SCH ENGN NAGOYA AICHI 4648603 JAPAN NAGOYA UNIV,CTR INFORMAT MEDIA STUDIES NAGOYA AICHI 4648603 JAPAN
Titolo Testata:
IEICE transactions on fundamentals of electronics, communications and computer science
fascicolo: 11, volume: E81A, anno: 1998,
pagine: 2274 - 2280
SICI:
0916-8508(1998)E81A:11<2274:NQSFCS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Keywords:
CDMA SLOTTED ALOHA SYSTEM; QS-SEQUENCES; ACCESS TIMING ERROR; ORTHOGONAL GOLD SEQUENCES; FLAT FADING CHANNEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
9
Recensione:
Indirizzi per estratti:
Citazione:
M. Saito et al., "NEW QUASI-SYNCHRONOUS SEQUENCES FOR CDMA SLOTTED ALOHA SYSTEMS", IEICE transactions on fundamentals of electronics, communications and computer science, E81A(11), 1998, pp. 2274-2280

Abstract

One of unique features of COMA 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 OS-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.

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Documento generato il 11/07/20 alle ore 20:38:07