Abstract
In this paper we investigate the possibilities to generate a postamble in block-oriented OFDM transmission without compromising the effective user data rate. The idea is to complete known bits at the end of each physical layer frame to a full OFDM symbol to be used for channel estimation. A Wiener Filter is then employed to interpolate between the channel estimates obtained on the pre- and postamble. We present experimental results for an IEEE 802.11a-like system. A comparison with purely preamble-based channel estimation shows a reduced mean square channel estimation error and bit error rate at low computational complexity and only minor reduction of the net user data rate. Results of robustness tests are also discussed.
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Bevermeier, M., Ebel, T., Haeb-Umbach, R. (2007). Channel estimation by exploiting sublayer information in OFDM systems. In: Plass, S., Dammann, A., Kaiser, S., Fazel, K. (eds) Multi-Carrier Spread Spectrum 2007. Lecture Notes Electrical Engineering, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6129-5_39
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DOI: https://doi.org/10.1007/978-1-4020-6129-5_39
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6128-8
Online ISBN: 978-1-4020-6129-5
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