An improved method for estimating the frequency correlation function

Handle URI:
http://hdl.handle.net/10754/564542
Title:
An improved method for estimating the frequency correlation function
Authors:
Chelli, Ali; Pätzold, Matthias
Abstract:
For time-invariant frequency-selective channels, the transfer function is a superposition of waves having different propagation delays and path gains. In order to estimate the frequency correlation function (FCF) of such channels, the frequency averaging technique can be utilized. The obtained FCF can be expressed as a sum of auto-terms (ATs) and cross-terms (CTs). The ATs are caused by the autocorrelation of individual path components. The CTs are due to the cross-correlation of different path components. These CTs have no physical meaning and leads to an estimation error. We propose a new estimation method aiming to improve the estimation accuracy of the FCF of a band-limited transfer function. The basic idea behind the proposed method is to introduce a kernel function aiming to reduce the CT effect, while preserving the ATs. In this way, we can improve the estimation of the FCF. The performance of the proposed method and the frequency averaging technique is analyzed using a synthetically generated transfer function. We show that the proposed method is more accurate than the frequency averaging technique. The accurate estimation of the FCF is crucial for the system design. In fact, we can determine the coherence bandwidth from the FCF. The exact knowledge of the coherence bandwidth is beneficial in both the design as well as optimization of frequency interleaving and pilot arrangement schemes. © 2012 IEEE.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2012 IEEE Wireless Communications and Networking Conference (WCNC)
Conference/Event name:
2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
Issue Date:
Apr-2012
DOI:
10.1109/WCNC.2012.6213930
Type:
Conference Paper
ISSN:
15253511
ISBN:
9781467304375
Appears in Collections:
Conference Papers; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChelli, Alien
dc.contributor.authorPätzold, Matthiasen
dc.date.accessioned2015-08-04T07:03:35Zen
dc.date.available2015-08-04T07:03:35Zen
dc.date.issued2012-04en
dc.identifier.isbn9781467304375en
dc.identifier.issn15253511en
dc.identifier.doi10.1109/WCNC.2012.6213930en
dc.identifier.urihttp://hdl.handle.net/10754/564542en
dc.description.abstractFor time-invariant frequency-selective channels, the transfer function is a superposition of waves having different propagation delays and path gains. In order to estimate the frequency correlation function (FCF) of such channels, the frequency averaging technique can be utilized. The obtained FCF can be expressed as a sum of auto-terms (ATs) and cross-terms (CTs). The ATs are caused by the autocorrelation of individual path components. The CTs are due to the cross-correlation of different path components. These CTs have no physical meaning and leads to an estimation error. We propose a new estimation method aiming to improve the estimation accuracy of the FCF of a band-limited transfer function. The basic idea behind the proposed method is to introduce a kernel function aiming to reduce the CT effect, while preserving the ATs. In this way, we can improve the estimation of the FCF. The performance of the proposed method and the frequency averaging technique is analyzed using a synthetically generated transfer function. We show that the proposed method is more accurate than the frequency averaging technique. The accurate estimation of the FCF is crucial for the system design. In fact, we can determine the coherence bandwidth from the FCF. The exact knowledge of the coherence bandwidth is beneficial in both the design as well as optimization of frequency interleaving and pilot arrangement schemes. © 2012 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleAn improved method for estimating the frequency correlation functionen
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journal2012 IEEE Wireless Communications and Networking Conference (WCNC)en
dc.conference.date1 April 2012 through 4 April 2012en
dc.conference.name2012 IEEE Wireless Communications and Networking Conference, WCNC 2012en
dc.conference.locationParisen
dc.contributor.institutionFaculty of Engineering and Science, University of Agder, Service Box 509, N-4898 Grimstad, Norwayen
kaust.authorChelli, Alien
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