EFFICIENT SPREADER FOR SPREAD SPECTRUM COMMUNICATION SYSTEMS

摘要

A spreading system and method for CDMA applications that requires fewer integer multiplications. User data is spread using real or complex integer based spreading codes of length SF to SFmax chips. At least one of the codes is of the form j . v[n] where v[n] is a spreading code. The complex rotation of the spreading code decreases the peak-to-average power ratio when the codes are summed up for transmission. The invention provides increased user separation using a plurality of spreading codes.