Estimating a transmission channel with pilot symbols...

Details Estimating a transmission channel with pilot symbols... Estimating a transmission channel with pilot symbols...

2007-12-18

2007-12-18

Payne, David C. (Department: 2611)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S260000, C370S206000, C370S208000, C455S701000, C455S702000, C455S059000, C455S267000

Reexamination Certificate

active

10493324

ABSTRACT:
A method for estimating a transmission channel from a multicarrier signal transmitted through said transmission channel, comprising real pilot symbols and so-called pure imaginary pilot symbols, consists in selecting one or several values zkof the received signal corresponding respectively to one or several real pilot symbols, and one or several values zlof the received signal corresponding respectively to one or several pure imaginary pilot symbols. The pilot symbols are sufficiently close both in frequency and in time such that it can be assumed that the fading of the signal through the transmission channel has a complex value α substantially identical for the symbols. An estimated value {circumflex over (α)} of α for the pilot symbols concerned is then determined by minimizing a least square equation involving the values zkand the values zl.

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International Search Report dated Feb. 3, 2003, Appl. No. PCT/FR02/03578.

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