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Titolo:
COMBINED CODING AND SPREADING IN DIRECT-SEQUENCE CDMA SYSTEMS
Autore:
LIESENFELD B; SCHOTTEN HD; ELDERSBOLL H;
Indirizzi:
RHEIN WESTFAL TH AACHEN,INST ELEKT NACHRICHTENTECH D-52056 AACHEN GERMANY
Titolo Testata:
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
fascicolo: 3, volume: 49, anno: 1995,
pagine: 135 - 142
SICI:
1434-8411(1995)49:3<135:CCASID>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Keywords:
DS-CDMA SYSTEM; ERROR CORRECTING CODE; BOUND ON ERROR PROBABILITY;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
B. Liesenfeld et al., "COMBINED CODING AND SPREADING IN DIRECT-SEQUENCE CDMA SYSTEMS", AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 49(3), 1995, pp. 135-142

Abstract

This paper presents an analysis of a direct-sequence code-division multiple-access communication system which assigns a set of M sequences to each user. Hence, each user transmits log(2) M bits of information per sequence. The probability of transmission errors depends on both the interference due to other users and the error correcting capabilityof the sets of sequences. To evaluate the performance of the considered system we assume that the channel is disturbed by additive white Gaussian noise, Further, optimum coherent demodulation and minimum Euclidean distance decoding of the sets of sequences are employed. By usingthe Gaussian approximation for the multiple-access interference, an upper bound on the error probability is obtained. The bound applies to many sets of sequences with good distance properties in the Euclidean space. Further, lower bounds on the cross-correlation between different sets of sequences are derived, which take into account the minium Hamming distance between different sequences in a set.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 19:10:44