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Near-Far Resistant Propagation Delay Estimators for Asynchronous Direct-Sequence Code Division Multiple Access Systems
Dept. EE, University of Florida, 405 CSE Building, Gainesville, Florida 32611, USA.
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0003-2298-6774
1994 (English)In: Lecture Notes in Computer Science: Mobile Communications, Proceedings 1994 International Zurich Seminar on Digital Communications, Springer-Verlag , 1994, 251-260 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper considers an asynchronous direct-sequence code division multiple access (DS-CDMA) communication system over an AWGN channel. We are interested in estimating the propagation delay from the different users to the receiver. The Cram'er-Rao bound for such an estimator is derived and compared with the measured variance of three algorithms. The performance of the classical correlation-based estimator is demonstrated to be quite good in a noise-limited scenario. However, in a near-far situation, i.e., when the multiple access interference becomes dominant, the performance of the classical method is severely degraded. We therefore propose two new algorithms which are shown to be near-far resistant.

Place, publisher, year, edition, pages
Springer-Verlag , 1994. 251-260 p.
Keyword [en]
communication system, DS-CDMA, Cram'er-Rao bound
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-92597OAI: oai:DiVA.org:kth-92597DiVA: diva2:513870
Conference
1994 International Zurich Seminar on Digital Communications
Note
NR 20140805Available from: 2012-04-03 Created: 2012-04-03 Last updated: 2012-04-03Bibliographically approved

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Ottersten, Björn

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