Patent ID: 6370131
Filing Date: 2002-04-09
Classification: H04B

Abstract:
A CDMA transmission apparatus comprising:a separating system that separates transmitting data into a plurality of channels; an inserting system that periodically inserts a pilot signal into a channel other than the plurality of channels; a spreading system that spreads a transmitting data signal on each of the plurality of channels and the pilot signal on the pilot signal channel according to a different spreading code for each channel; a multiplexer that multiplexes the spread transmitting data signals; and a transmitter that transmits the multiplexed transmitting data signals and the pilot signal in a time division multiplexing manner, the pilot signal being transmitted in a first interval and the multiplexed transmitting data signals being transmitted in another interval; wherein a transmission power per channel of the transmitter during the first interval is greater than a transmission power per channel of the transmitter during the other interval.