On preamble-based channel estimation in OFDM/OQAM systems

Dimitrios Katselis; Mats Bengtsson; Cristian R. Rojas; Håkan Hjalmarsson; Eleftherios Kofidis

On preamble-based channel estimation in OFDM/OQAM systems

Dimitrios Katselis, Mats Bengtsson, Cristian R. Rojas, Håkan Hjalmarsson, Eleftherios Kofidis

Research output: Contribution to journal › Conference article › peer-review

Abstract

In this paper, the problem of preamble-based channel estimation in OFDM offset QAM (OFDM/OQAM) systems under a deterministic channel assumption is studied. Recent results indicate that full (all tones carrying pilot symbols) preambles with equal pilot symbols are locally optimal, in the sense that they yield a local minimum of the mean square error (MSE) performance metric of the estimated channel frequency response (CFR), subject to a total training energy constraint. We study the problem of finding the globally optimal full preamble. We show that under a channel constancy assumption, the global optimum coincides with the full preamble of equal symbols. The same result holds even if the channel constancy assumption is removed. Numerical simulations are presented to support the derived results.

Original language	English (US)
Pages (from-to)	1618-1622
Number of pages	5
Journal	European Signal Processing Conference
State	Published - Dec 1 2011
Externally published	Yes
Event	19th European Signal Processing Conference, EUSIPCO 2011 - Barcelona, Spain Duration: Aug 29 2011 → Sep 2 2011

ASJC Scopus subject areas

Signal Processing
Electrical and Electronic Engineering

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title = "On preamble-based channel estimation in OFDM/OQAM systems",

abstract = "In this paper, the problem of preamble-based channel estimation in OFDM offset QAM (OFDM/OQAM) systems under a deterministic channel assumption is studied. Recent results indicate that full (all tones carrying pilot symbols) preambles with equal pilot symbols are locally optimal, in the sense that they yield a local minimum of the mean square error (MSE) performance metric of the estimated channel frequency response (CFR), subject to a total training energy constraint. We study the problem of finding the globally optimal full preamble. We show that under a channel constancy assumption, the global optimum coincides with the full preamble of equal symbols. The same result holds even if the channel constancy assumption is removed. Numerical simulations are presented to support the derived results.",

author = "Dimitrios Katselis and Mats Bengtsson and Rojas, {Cristian R.} and H{\aa}kan Hjalmarsson and Eleftherios Kofidis",

year = "2011",

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language = "English (US)",

pages = "1618--1622",

journal = "European Signal Processing Conference",

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T1 - On preamble-based channel estimation in OFDM/OQAM systems

AU - Katselis, Dimitrios

AU - Bengtsson, Mats

AU - Rojas, Cristian R.

AU - Hjalmarsson, Håkan

AU - Kofidis, Eleftherios

PY - 2011/12/1

Y1 - 2011/12/1

N2 - In this paper, the problem of preamble-based channel estimation in OFDM offset QAM (OFDM/OQAM) systems under a deterministic channel assumption is studied. Recent results indicate that full (all tones carrying pilot symbols) preambles with equal pilot symbols are locally optimal, in the sense that they yield a local minimum of the mean square error (MSE) performance metric of the estimated channel frequency response (CFR), subject to a total training energy constraint. We study the problem of finding the globally optimal full preamble. We show that under a channel constancy assumption, the global optimum coincides with the full preamble of equal symbols. The same result holds even if the channel constancy assumption is removed. Numerical simulations are presented to support the derived results.

AB - In this paper, the problem of preamble-based channel estimation in OFDM offset QAM (OFDM/OQAM) systems under a deterministic channel assumption is studied. Recent results indicate that full (all tones carrying pilot symbols) preambles with equal pilot symbols are locally optimal, in the sense that they yield a local minimum of the mean square error (MSE) performance metric of the estimated channel frequency response (CFR), subject to a total training energy constraint. We study the problem of finding the globally optimal full preamble. We show that under a channel constancy assumption, the global optimum coincides with the full preamble of equal symbols. The same result holds even if the channel constancy assumption is removed. Numerical simulations are presented to support the derived results.

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