Pulse or digital communications – Transceivers
Reexamination Certificate
2005-02-09
2009-06-23
Pathak, Sudhanshu C (Department: 2611)
Pulse or digital communications
Transceivers
C375S220000, C375S354000, C341S155000, C704S205000, C370S203000
Reexamination Certificate
active
07551666
ABSTRACT:
A base station2demodulates a wireless signal after downconverting the signal to a low-frequency signal whose center frequency is fi [Hz] and oversampling the signal. A mobile station3demodulates a wireless signal after downconverting the signal to a low-frequency signal whose center frequency is fd [Hz] and undersampling the signal. The same sampling frequency fs [Hz] is used in the base station2and in the mobile station3. The sampling frequency fs [Hz] is set to a value that is an even-number multiple of a wireless symbol transmission rate such that oversampling is done in the base station2and undersampling is done in the mobile station3. The center frequency fi [Hz] is ½ to 1 times a frequency corresponding to the bandwidth and is ½N(N is a natural number) times the sampling frequency fs [Hz].
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Mori Ken-ichi
Takai Hitoshi
Panasonic Corporation
Pathak Sudhanshu C
Wenderoth , Lind & Ponack, L.L.P.
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