Narrowband Interference Canceller with Adaptive Compensation Filter in CDMA System

摘要

1. TECHNICAL FIELD OF THE INVENTION;The present invention relates to a narrowband interference noise control device using an adaptive compensation circuit in a code division multiple access system.;2. The technical problem the invention is trying to solve;The present invention is a narrowband interference noise control device that removes / suppresses the narrowband interference noise as much as possible using autoregressive, least square average (LMS) algorithm, and adaptive compensation algorithm before despreading the received signal. To provide the purpose.;3. Summary of solution of design;The present invention provides an analog-to-digital (A / D) conversion means for converting a received analog signal into a digital signal; Digital downconverting means (DDC) for converting the digital signal converted by the analog-digital converting means into a baseband signal; Narrowband interference noise signal components are removed from the baseband signal converted by the digital downconversion means using autoregressive, least mean square (LMS) algorithm, and adaptive compensation algorithm. Adaptive interference noise control means for controlling the noise within a predetermined reference range; Digital upconverting means (DUC) for converting a digital signal from which narrowband interference noise has been removed in the adaptive interference noise control means into a digital upconverting frequency band signal; And digital-to-analog (D / A) converting means for converting the digital upconverting frequency band signal converted by the digital upconverting means into an analog signal.;4. Important uses of the devise;The present invention is used for interference noise control in code division multiple access system.