NDLI: Joint estimation of multipath parameters from OFDM signals in mobile channels

Content Provider	IEEE Xplore Digital Library
Author	Letzepis, N. Grant, A. Alexander, P. Haley, D.
Copyright Year	2011
Description	Author affiliation: Institute for Telecommunications Research (Letzepis, N.; Grant, A.) \|\| Cohda Wireless Pty. Ltd (Alexander, P.; Haley, D.)
Abstract	We study joint estimation of multipath parameters from orthogonal frequency division multiplex signals transmitted over doubly dispersive mobile radio channels. In particular, we study the joint estimation of the complex gain, delay and Doppler offset of each tap of the multipath channel impulse response. For such channels, the frequency domain channel coefficients for an entire packet can be expressed as the superimposition of two-dimensional complex sinusoids. The maximum likelihood estimate requires solution of a multidimensional non-linear least squares problem, which is computationally infeasible in practice. Therefore, we propose a low complexity suboptimal solution based on iterative successive and parallel cancellation. We demonstrate via Monte Carlo simulations that the root mean squared error statistics of our estimator are very close to the Cramer-Rao lower bound of a single two-dimensional sinusoid in Gaussian noise.
Starting Page	106
Ending Page	111
File Size	150736
Page Count	6
File Format	PDF
ISBN	9781424497140
e-ISBN	9781424497157
DOI	10.1109/AUSCTW.2011.5728746
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-01-31
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Maximum likelihood estimation OFDM Complexity theory Doppler effect Delay Multipath channels
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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