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Blind timing and carrier synchronisation in distributed multiple input multiple output communication systems

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3 Author(s)
A. A. Nasir ; School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australia ; S. Durrani ; R. A. Kennedy

This study addresses the problem of joint blind timing and carrier synchronisation in a (distributed-MN antenna system where the objective is to estimate the M carrier offsets, the M timing offsets and to recover the transmitted symbols for each of the M users given only the measured signal at the N antennas of the receiver. The authors propose a modular receiver structure that exploits blind source separation to reduce the problem into more tractable sub-problems of estimating individual timing and carrier offsets for multiple users. This leads to a robust solution of low complexity. The authors investigate the performance of the estimators analytically using modified Cramer-Rao bounds and computer simulations. The results show that the proposed receiver exhibits robust performance over a wide range of parameter values, even with worst-case Doppler of 200-300-Hz and frame size as small as 400 symbols. This work is relevant to future wireless networks and is a complete solution to the problem of estimating multiple timing and carrier offsets in distributed multiple input multiple output (MIMO) communication systems.

Published in:

IET Communications  (Volume:5 ,  Issue: 7 )