Multiplex communications – Generalized orthogonal or special mathematical techniques – Fourier transform
Patent
1997-01-15
1999-06-15
Vu, Huy D.
Multiplex communications
Generalized orthogonal or special mathematical techniques
Fourier transform
H04J 1100
Patent
active
059128763
ABSTRACT:
A method for channel response estimation over a fast fading channel and signal estimation using a coded pilot is disclosed. A coded orthogonal frequency division modulated (OFDM) signal is generated including a main signal portion and a coded pilot signal portion. The coded OFDM signal is transmitted over a fading channel to a receiving unit wherein the received portion of the main signal is detected and an estimation is made of the frequency response of the fading channel using the coded pilot signal portion of the transmitted signal. The detected received main signal and the estimated channel frequency response are then used to estimate the signal. This determination may be based upon a channel inversion of the frequency response or new channel estimation combined with maximum likelihood sub-sequence estimation.
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Boakye Alexander
Ericsson Inc.
Vu Huy D.
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