Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2007-07-10
2007-07-10
Payne, David C. (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S259000, C455S059000
Reexamination Certificate
active
10479190
ABSTRACT:
The invention concerns a method for estimating the transfer function of a multicarrier signal transmission channel consisting of a temporal succession of symbols of a set of data elements, each of the data elements modulating a carrier frequency of the signal, the data elements comprising pilots and so-called informative data elements. The invention is characterized in that said method comprises: a step which consists in determining a set of two-dimensional discrete prolate spheroidal sequences (DPSS); a step which consists in writing the transfer function in the form of a combination of at least some of the two-dimensional discrete prolate spheroidal sequences (DPSS); a step which consists in time-based and frequency-based two-dimensional interpolation of at least some of the coefficients of the combination, so as to obtain an estimation of the transfer function at any point of a time-frequency network.
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R. Chapman, T.S.Durrani, Optimal Cumulant Domain Filtering, Signal Processing Division, Electronic & Electrical Engineering Dept., University of Strathclyde, Glasgow, G1 IXW, UK.
Alard Michel
Bietrix Franck
Goudard Nathalie
Rouxel Alexandre
File Erin M.
Payne David C.
Wavecom
Westman Champlin & Kelly
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