Patent ID: 6625173
Filing Date: 2003-09-23
Classification: H04B,H04W

Abstract:
A CDMA base station transmitter comprising:a plurality of channel signal processing means provided for each communication channel, each of said means for converting an amplitude signal and a transmission signal into a serial signal to output the serial signal, the amplitude signal being generated on a basis of an amplitude controlling signal included in a received signal from a mobile station and directing whether an amplitude of a signal to be transmitted from a base station is increased or decreased, and the transmission signal representing information to be transmitted to the mobile station, and each of said means inserting a dummy bit between the transmission signal and the amplitude signal in generating the serial signal; serial-to-parallel converting means for separating the serial signal from each of said channel signal processing means into the transmission signal and the amplitude signal; spread modulating means for spread modulating each of the transmission signals supplied from the serial-to-parallel converting means with a corresponding spread code; and combining means for changing the signals spread modulated at said spread modulating means to have amplitudes indicated by the respective amplitude signals and then combining the changed signals into a combined spread signal.