ADAPTIVE CODE ACQUISITION WITH RECEIVE DIVERSITY AND CONSTANT FALSE ALARM RATE SCHEMES UNDER NONHOMOGENEOUS FADING CIRCUMSTANCES

摘要

An apparatus and a method for adaptive code acquisition are provided to improve the performance of a code acquisition system and obtain theories suitable to design the system actually. Adaptive code acquisition is performed by applying a detection method, which uses a cell average constant false alarm rate scheme, to signals received from a plurality of antennas, in a non-homogeneous fading circumstance. The cell average constant false alarm rate scheme uses a detection rate expressed by the following equation; PD=ICA(SP)(1-ICA(0P))^(M-1). The cell average constant false alarm rate scheme uses a false alarm rate expressed by the following equations; PFA=1/LPx(ICA(0P)(1-ICA(SP))(1-ICA(0P))^(M-2))+((LP-1)/LP)x(ICA(0P)(1-ICA(0P))^(M-1)).