Title :
Pilot tone selection for channel estimation in a mobile OFDM system
Author :
Negi, Rohit ; Cioffi, John
Author_Institution :
Inf. Syst. Lab., Stanford Univ., CA, USA
fDate :
8/1/1998 12:00:00 AM
Abstract :
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
Keywords :
Gaussian noise; Markov processes; frequency division multiplexing; frequency response; mobile radio; parameter estimation; telecommunication channels; white noise; AWGN; channel estimation; equally spaced tones; first order Markov channel; mobile OFDM system; orthogonal frequency division multiplexing; pilot tone selection; Blind equalizers; Channel estimation; Frequency domain analysis; Frequency estimation; Frequency response; Information systems; Laboratories; OFDM; Time-varying channels; Training data;
Journal_Title :
Consumer Electronics, IEEE Transactions on
