H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/69 (2006.01) H04B 1/707 (2006.01) H04Q 7/32 (2006.01)
Patent
CA 2153516
A mobile station of a code division multiple access mobile communication system for transmission by carrying out quadrature multiplexing of a pilot signal and a data signal having I and Q components spread by spectrum from the base station to the mobile station, includes a despreading circuit for generating phase error signals (.DELTA.I, .DELTA.Q) by despreading the quadrature multi- plexed reception signals (I', Q') by using spreading codes for pilot symbol, another spreading circuit for generating a data signal group by despreading the recep- tion signals by using spreading codes for data symbol, accumulators for converting the transmission rate of the phase error signals and the data signal group into the symbol rate, an averaging circuit for generating phase correction signals from the phase error signals of the symbol rate, and a phase correction circuit for gener- ating data signals (I, Q) with the phase shifts being removed therefrom, by correcting the data signal group by the phase correction signals.
Doi Nobukazu
Ohgoshi Yasuo
Yano Takashi
Hitachi Communication Technologies Ltd.
Kirby Eades Gale Baker
LandOfFree
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