Patent ID: 6810074
Filing Date: 2004-10-26
Classification: H04B

Abstract:
An apparatus for detecting an on-off keying signal in a CDMA (Code Division Multiple Access) mobile station device, comprising:a first calculator for receiving an on-off keying signal and a reference signal transmitted from a base station transmitter at a given transmission power level, respectively, for despreading the received on-off keying signal, and for generating a symbol power level of the despread on-off keying signal; a second calculator for despreading said reference signal and for generating a power level of the despread reference signal; a multiplier for generating a variable threshold value by multiplying said power level of the despread reference signal by a gain determined by a ratio of the transmission power of the reference signal from the base station transmitter to the transmission power of the on-off keying signal from the transmitter; and a comparator for comparing said variable threshold value with said symbol power level of the despread on-off keying signal.