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Preamble Design for Multiple-Antenna OFDM

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2 Author(s)
Qingyu Zhu ; Lemko Corp., Schaumburg ; Liu, Zhiqiang

In this paper, we pursue the preamble design for multiple-antenna orthogonal frequency division multiplexing (OFDM) communications over frequency-selective channels. To reduce the overhead and minimize the peak-to-average power ratio, we propose a preamble consisting of a single constant- modulus training sequence per transmit-antenna. This proposed design is shown capable of not only achieving reliable frequency and time synchronization but also facilitating low-complexity channel estimation. Furthermore, when synchronization is perfect, it is optimal in the sense of minimizing the mean squared error of least-squares channel estimation. The performance of the proposed design is investigated via simulations and compared with a competing alternative.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:7 ,  Issue: 4 )

Date of Publication:

April 2008

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