Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-01-02
2007-01-02
Kim, Kevin (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C455S009000, C370S342000
Reexamination Certificate
active
10132800
ABSTRACT:
There is provided a channel estimation apparatus for estimating a radio channel environment by multiplying a currently received bit signal of a pilot signal and previously received bit signals by weights, and summing the weighted currently received bit signal and the weighted previously received bit signals in a CDMA mobile communication system receiving the pilot signal comprised of a stream of bits having given bit values, and a power control signal comprised of power control bits. In the channel estimation, a predictor predicts a next bit signal succeeding the currently received bit signal, multiplies the predicted next bit signal by a weight, and generates a weighted next bit signal. A summer sums the weighted next bit signal from the predictor, the weighted currently received bit signal and the previously received bit signals.
REFERENCES:
patent: 6493329 (2002-12-01), Leung
Ahn Jae-Min
Bae Kwang-Seog
Choi Hyung-Jin
Lee Young-Yong
Rim Min-Joong
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