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Low Complexity High Resolution Joint Timing and Doppler Acquisition for DS-CDMA Systems

Groh, Ingmar and Sand, Stephan (2011) Low Complexity High Resolution Joint Timing and Doppler Acquisition for DS-CDMA Systems. 74th IEEE Vehicular Technology Conference (VTC-FAll), 5-8 Sep 2011, San Francisco, CA, USA.

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Abstract

This paper presents a novel low complexity high resolution timing and Doppler acquisition algorithm for direct sequence code division multiple access (DS-CDMA) systems. We apply the two-dimensional unitary estimation of signal parameters via rotational invariant techniques (ESPRIT) algorithm to the joint delay and Doppler acquisition task in multipath environments. Additionally, we use the advantageous beam space (BS) implementation of unitary ESPRIT, which reduces the computational complexity once again remarkably. The exploitation of a-priori knowledge according to the BS version of unitary ESPRIT also reduces the root mean square error (RMSE) at low signal to noise ratios (SNRs). Furthermore, we enhance the delay and Doppler multipath acquisition by the two-dimensional structured least squares (SLS) algorithm. Thus, our delay and Doppler RMSE reaches the Cramer-Rao bound (CRB) almost as good as maximum likelihood (ML) delay and Doppler acquisition. However, our algorithms save computational complexity compared to the ML algorithm by several orders of magnitude.

Item URL in elib:https://elib.dlr.de/69863/
Document Type:Conference or Workshop Item (Poster)
Title:Low Complexity High Resolution Joint Timing and Doppler Acquisition for DS-CDMA Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Groh, IngmarUNSPECIFIEDUNSPECIFIED
Sand, Stephanstephan.sand (at) dlr.deUNSPECIFIED
Date:2011
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:spread spectrum system, timing and Doppler acquisition, unitary ESPRIT, beam space implementation
Event Title:74th IEEE Vehicular Technology Conference (VTC-FAll)
Event Location:San Francisco, CA, USA
Event Type:international Conference
Event Dates:5-8 Sep 2011
Organizer:IEEE Vehicular Technology Society
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - Vorhaben GNSS2/Neue Dienste und Produkte (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Sand, Dr Stephan
Deposited On:07 Oct 2011 09:24
Last Modified:02 Dec 2016 13:58

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