Phase noise and carrier frequency offset in OFDM systems: joint estimation and hybrid Cramer-Rao lower bound

Salim, Omar Hazim and Nasir, Ali A. and Mehrpouyan, Hani and Xiang, Wei (2013) Phase noise and carrier frequency offset in OFDM systems: joint estimation and hybrid Cramer-Rao lower bound. In: 14th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2013), 16-19 Jun 2013, Darmstadt, Germany.

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In this paper, a new iterative pilot-aided algorithm
based on expectation conditional maximization (ECM) for joint estimation of Wiener phase noise (PHN) and carrier frequency offset (CFO) in orthogonal frequency division multiplexing (OFDM) systems is proposed. Next, a new expression for the hybrid Cramer-Rao lower bound (HCRB) for joint estimation of PHN and CFO in OFDM systems is derived. Numerical results show that the proposed estimator outperforms existing algorithms in terms of mean square error while performing close to the derived HCRB at moderate PHN variances. Moreover, the proposed estimator is found to be computationally more efficient than existing algorithms since it jointly estimates PHN and CFO in a few iterations.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 IEEE. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 08 Oct 2013 05:34
Last Modified: 15 Sep 2014 02:16
Uncontrolled Keywords: OFDM; joint estimation; phase noise; carrier frequency offset; hybrid Cramer-Rao lower bound
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090609 Signal Processing
08 Information and Computing Sciences > 0801 Artificial Intelligence and Image Processing > 080110 Simulation and Modelling
10 Technology > 1005 Communications Technologies > 100510 Wireless Communications
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970108 Expanding Knowledge in the Information and Computing Sciences
Identification Number or DOI: 10.1109/SPAWC.2013.6612130

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