Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2004-12-07
2008-11-11
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S136000, C375S147000, C375S150000, C375S271000, C375S343000
Reexamination Certificate
active
07450669
ABSTRACT:
An OFDM modulation apparatus receives a signal composed of OFDM symbols each of which is composed of an effective symbol and a guard interval, generates K delayed signals by delaying the received signal by K effective symbol periods, generates a signal by adding up all the K delayed signals, generates a first correlation signal that shows a correlation between the received signal and the addition-result signal, generates K×L second correlation signals from the first correlation signal, based on K×L combinations of K effective symbol periods and L fractions used to indicate the guard interval period, detects one among the K×L second correlation signals that indicates a largest correlation level, and detect periods of the effective symbol and the guard interval of the received signal in accordance with the detected second correlation signal.
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Liu Shuwang
Panasonic Corporation
Singh Hirdepal
LandOfFree
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