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Titolo:
Analysis of quasi-ML multiuser detection of DS/CDMA systems in asynchronous channels
Autore:
Kim, KS; Song, I; Kim, YH; Lee, YU; Lee, J;
Indirizzi:
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 p Engn, La Jolla, CA 92093 USA Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea Korea Adv Inst Sci & Technol Taejon South Korea 305701 5701, South Korea Hallym Univ, Sch Informat & Elect Engn, Div Elect Engn, Kangwon Do 200702,South Korea Hallym Univ Kangwon Do South Korea 200702 Kangwon Do 200702,South Korea
Titolo Testata:
IEEE TRANSACTIONS ON COMMUNICATIONS
fascicolo: 12, volume: 47, anno: 1999,
pagine: 1875 - 1883
SICI:
0090-6778(199912)47:12<1875:AOQMDO>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
MULTIPLE-ACCESS CHANNELS; SPREAD-SPECTRUM; CELLULAR CDMA; COMMUNICATION-SYSTEMS; ANTENNA; RECEIVERS; DIVERSITY; CAPACITY;
Keywords:
antenna array; CDMA system; multiuser detection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, KS Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 La Jolla, CA 92093 USA
Citazione:
K.S. Kim et al., "Analysis of quasi-ML multiuser detection of DS/CDMA systems in asynchronous channels", IEEE COMMUN, 47(12), 1999, pp. 1875-1883

Abstract

In this paper, we consider the quasi-maximum-likelihood (quasi-ML) detectors of the reverse link system that uses antenna arrays in asynchronous channels when the channel vector is time-invariant and time-varying. A channel vector estimation method based on eigendecomposition for time-invariant channels and its adaptive version suitable for the time-varying channels are also proposed. It is shown that the proposed quasi-ML detector can be regarded as a beamformer followed by a decorrelating filter and that the proposedsystem performs better than the conventional decorrelator scheme. It is also observed that the performance gain of the proposed scheme over the conventional decorrelator system increases as the numbers of active users and antenna arrays increase.

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Documento generato il 06/07/20 alle ore 05:31:24