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• W2040347860 abstract "Cooperative communication systems employ cooperation among nodes in a wireless network to increase data throughput and robustness to signal fading. However, such advantages are only possible if there exist perfect synchronization among all nodes. Impairments like channel multipath, time varying phase noise (PHN) and carrier frequency offset (CFO) result in the loss of synchronization and diversity performance of cooperative communication systems. Joint estimation of these multiple impairments is necessary in order to correctly decode the received signal in cooperative systems. In this paper, we propose an iterative pilot-aided algorithm based on expectation conditional maximization (ECM) for joint estimation of multipath channels, Wiener PHNs, and CFOs in amplify-and-forward (AF) based cooperative orthogonal frequency division multiplexing (OFDM) system. Numerical results show that the proposed estimator achieves mean square error performance close to the derived hybrid Cramer-Rao lower bound (HCRB) for different PHN variances." @default.
• W2040347860 created "2016-06-24" @default.
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• W2040347860 date "2014-06-01" @default.
• W2040347860 modified "2023-10-16" @default.
• W2040347860 title "Joint channel, phase noise, and carrier frequency offset estimation in cooperative OFDM systems" @default.
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• W2040347860 doi "https://doi.org/10.1109/icc.2014.6884010" @default.
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