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Pilot tone selection for channel estimation in a mobile OFDM system

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2 Author(s)
Negi, R. ; Inf. Syst. Lab., Stanford Univ., CA, USA ; Cioffi, J.

Channel estimation for mobile OFDM systems requires transmission of pilot tones. This paper addresses the important issue of selecting these pilot tones, so as to achieve a good quality estimate. It is shown that the best set of tones to be used are those which are equally spaced. Furthermore, it is shown using the case of a first order Markov channel, that it is more efficient to use a few pilot tones in all symbols, rather than use all tones as pilot tones in some symbols

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Consumer Electronics, IEEE Transactions on  (Volume:44 ,  Issue: 3 )