Patent ID: 7123645
Filing Date: 2006-10-17
Classification: H04B,H04L

Abstract:
1. A spread-spectrum signal receiver for receiving a signal obtained by rendering transmit data and control data, which have been modulated at powers that differ from each other, into signals that do not influence each other, multiplexing these signals and transmitting the multiplexed signal, the apparatus comprising: a despreader for despreading a receive signal to thereby demodulate a control-data signal and a transmit-data signal; a channel estimation unit for deriving a channel estimation value from a pilot signal that is contained in the control-data signal; a channel compensation unit for performing channel compensation of the transmit-data and control-data signals based upon the channel estimation a power calculation unit for calculating power of the transmit-data signal and power of the control-data signal after the channel compensation thereof and calculating a power ratio representing the ratio of the calculated power of the transmit-data signal to the calculated power of the control-data signal; a signal-level changing unit for raising, on the basis of the power ratio, the level of whichever of the signals has the lower power; and a decoder for executing decoding processing based upon the signal the level of which has been changed by said signal-level changing unit.