Method for extracting a variable reference pattern

Details Method for extracting a variable reference pattern Method for extracting a variable reference pattern

2007-12-25

2007-12-25

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S296000, C370S203000, C370S208000, C370S491000, C370S500000

Reexamination Certificate

active

10467571

ABSTRACT:
A method is provided for extracting a sequence of pilot symbols enabling to estimate the transfer function of a transmission channel. At least a radiocommunication device communicates through the channel with a remote station, the latter regularly delivering to the radiocommunication device a reference pattern. The structure of the reference pattern is variable, depending on at least one characteristic of the transmission channel.

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Magnus Sandell (PHD thesis, “Design and Analysis of Estimators for Multicarrier Modulation and Ultrasonic Imaging” Lulea University, Sweden, 1996).
Frederik Tufvesson and Torleiv Maseng, “Pilot Assisted Channel Estimation for OFDM in Mobile Cellular Systems” Department of Applied Electronics, Lund University, Lund, Sweden, 1997 IEEE.
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“Degradation of Multicarrier and Single Carrier Transmission with Frequency Domain Equalization due to Pilot-Aided Channel Estimation and Frequency Synchronization”, A. Czylwik et al., IEEE Nov. 1997, pp. 27-31.

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