CELL SCANNER OF ASYNCHRONOUS CDMA COMMUNICATION SYSTEM

摘要

PURPOSE: A cell scanner of an asynchronous CDMA(Code Division Multiple Access) communication system is provided to construct simple hardware by removing previously phase error components. CONSTITUTION: A complex despreading unit(21) multiplies input data and a spreading code to despread the input data. A delay unit(23,24) delays the in-phase component and the quadature-phase component of the despread data. A multiplication unit(25,26) multiplies the in-phase component of the despread data and the in-phase component of the delayed data, and multiplies the quadature-phase component of the despread data and the quadature-phase component of the delayed data. An integration unit(27) adds two results from the multiplication unit(25,26).