Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2007-04-10
2007-04-10
Vo, Don N. (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S350000
Reexamination Certificate
active
10674352
ABSTRACT:
The apparatus for communication channel estimation device of the present invention includes: a frequency response square computing circuit, to generate a first frequency response corresponding to a first frequency and a second frequency response corresponding to a second frequency according to a input signal, and to square the first and the second frequency response; and an estimating circuit, to estimate a channel length according to the squares of the first frequency and the second frequency response. Wherein the input signal is transmitted in a symbol rate and the first frequency and the second frequency are 1/M and 1/N times of the symbol rate respectively, wherein M and N are in the order of 2.
REFERENCES:
patent: 5251237 (1993-10-01), Baier
patent: 5909426 (1999-06-01), Liau et al.
patent: 7136111 (2006-11-01), Kim
patent: 2003/0112860 (2003-06-01), Erdogan
patent: 2005/0084044 (2005-04-01), Kokkonen
Hsieh Meng-Han
Kuo Shieh-Hsing
Lin Hou-Wei
Yen Kuang-Yu
Bacon & Thomas PLLC
Realtek Semiconductor Corp.
Vo Don N.
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