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http://dx.doi.org/10.5909/JBE.2012.17.5.864

Carrier Frequency Offset Estimation Method for Single-Carrier MIMO Systems  

Oh, Jong-Kyu (Department of Electronic Engineering, Konkuk University)
Kim, Joon-Tae (Department of Electronic Engineering, Konkuk University)
Publication Information
Journal of Broadcast Engineering / v.17, no.5, 2012 , pp. 864-875 More about this Journal
Abstract
In this paper, we propose a carrier frequency offset estimation method for single-carrier MIMO systems. In the proposed method, phase rotated PN (Pseudo-Noise) sequences are transmitted to prevent a cancelling out of partial PN sequences. After removing a modulation of received PN sequences by multiplying of complex conjugated PN Sequences which are locally generated in receiver, a CFO (Carrier Frequency Offset) is accurately estimated by employing L&R method which is a kind of ML (Maximum Likelihood) estimation algorithm and uses multiple auto-correlatos. In addition, the frequency offset estimation scheme by using channel state information is proposed for accurate CFO estimation in time-varying Rayleigh channel. By performing computer simulations, MSE (Mean Square Error) performance of proposed method is almost same as MSE performance of SISO systems in AWGN channel. Moreover, MSE Performance of proposed method with using channel information is higher than MSE performances of SISO system and conventional method in time-varying Rayleigh channel.
Keywords
Carrier Frequency Offset; MIMO Transmission Systems; Single Carrier;
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Times Cited By KSCI : 1  (Citation Analysis)
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