On the SNR-optimal null subcarrier placement for blind carrier offset estimation in OFDM systems

Yan Wu; Samir Attallah; J.W.M. Bergmans

doi:10.1109/GLOCOM.2006.572

On the SNR-optimal null subcarrier placement for blind carrier offset estimation in OFDM systems

Yan Wu, Samir Attallah, J.W.M. Bergmans

Signal Processing Systems

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

1 Citation (Scopus)

Abstract

A blind carrier frequency offset (CFO) estimation algorithm using the null subcarriers for orthogonal frequency diversity multiplexing (OFDM) systems was proposed in [1]. The optimal null subcarrier placement that minimizes the Cramer-Rao bound (CRB) was studied in [3]. In this paper, we study the optimal null subcarrier placement from an SNR maximization point of view. We first derive the relationship between the SNR of the CFO estimation and the placement of null subcarriers. Based on that, we formulate the optimization problem and find the optimal solution using convex optimization for small CFO values. We also discuss the optimality of the null subcarrier placement in practical OFDM systems where guard bands are required at both ends of the spectrum.

Original language	English
Title of host publication	IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	5
ISBN (Print)	1-4244-0356-1
DOIs	https://doi.org/10.1109/GLOCOM.2006.572
Publication status	Published - 1 Dec 2006
Event	2006 IEEE Global Telecommunications Conference (GLOBECOM 2006) - San Francisco, United States Duration: 27 Nov 2006 → 1 Dec 2006

Conference

Conference	2006 IEEE Global Telecommunications Conference (GLOBECOM 2006)
Country/Territory	United States
City	San Francisco
Period	27/11/06 → 1/12/06

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10.1109/GLOCOM.2006.572

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title = "On the SNR-optimal null subcarrier placement for blind carrier offset estimation in OFDM systems",

abstract = "A blind carrier frequency offset (CFO) estimation algorithm using the null subcarriers for orthogonal frequency diversity multiplexing (OFDM) systems was proposed in [1]. The optimal null subcarrier placement that minimizes the Cramer-Rao bound (CRB) was studied in [3]. In this paper, we study the optimal null subcarrier placement from an SNR maximization point of view. We first derive the relationship between the SNR of the CFO estimation and the placement of null subcarriers. Based on that, we formulate the optimization problem and find the optimal solution using convex optimization for small CFO values. We also discuss the optimality of the null subcarrier placement in practical OFDM systems where guard bands are required at both ends of the spectrum.",

author = "Yan Wu and Samir Attallah and J.W.M. Bergmans",

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doi = "10.1109/GLOCOM.2006.572",

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booktitle = "IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference",

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note = "2006 IEEE Global Telecommunications Conference (GLOBECOM 2006) ; Conference date: 27-11-2006 Through 01-12-2006",

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Wu, Y, Attallah, S & Bergmans, JWM 2006, On the SNR-optimal null subcarrier placement for blind carrier offset estimation in OFDM systems. in IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference., 4151202, Institute of Electrical and Electronics Engineers, Piscataway, 2006 IEEE Global Telecommunications Conference (GLOBECOM 2006), San Francisco, California, United States, 27/11/06. https://doi.org/10.1109/GLOCOM.2006.572

On the SNR-optimal null subcarrier placement for blind carrier offset estimation in OFDM systems. / Wu, Yan; Attallah, Samir; Bergmans, J.W.M.
IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference. Piscataway: Institute of Electrical and Electronics Engineers, 2006. 4151202.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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N2 - A blind carrier frequency offset (CFO) estimation algorithm using the null subcarriers for orthogonal frequency diversity multiplexing (OFDM) systems was proposed in [1]. The optimal null subcarrier placement that minimizes the Cramer-Rao bound (CRB) was studied in [3]. In this paper, we study the optimal null subcarrier placement from an SNR maximization point of view. We first derive the relationship between the SNR of the CFO estimation and the placement of null subcarriers. Based on that, we formulate the optimization problem and find the optimal solution using convex optimization for small CFO values. We also discuss the optimality of the null subcarrier placement in practical OFDM systems where guard bands are required at both ends of the spectrum.

AB - A blind carrier frequency offset (CFO) estimation algorithm using the null subcarriers for orthogonal frequency diversity multiplexing (OFDM) systems was proposed in [1]. The optimal null subcarrier placement that minimizes the Cramer-Rao bound (CRB) was studied in [3]. In this paper, we study the optimal null subcarrier placement from an SNR maximization point of view. We first derive the relationship between the SNR of the CFO estimation and the placement of null subcarriers. Based on that, we formulate the optimization problem and find the optimal solution using convex optimization for small CFO values. We also discuss the optimality of the null subcarrier placement in practical OFDM systems where guard bands are required at both ends of the spectrum.

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BT - IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference

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T2 - 2006 IEEE Global Telecommunications Conference (GLOBECOM 2006)

Y2 - 27 November 2006 through 1 December 2006

ER -

On the SNR-optimal null subcarrier placement for blind carrier offset estimation in OFDM systems

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