CIRCUIT FOR REMOVING INTERFERENCE SIGNAL OF CDMA SYSTEM

摘要

PURPOSE: A removing circuit of interference signal in a CDMA(code division multiple access) system is provided to minimize a damage of a CDMA signal component and to exactly remove the interference signal component of narrow band mixed in the CDMA signal. CONSTITUTION: An interference signal mixed in a received signal is detected by a detecting unit of interference signal. A control signal for varying a frequency eliminating band of a variable BEF(band-elimination filter) is outputted to the variable BEF by detecting a frequency band of interference signal with a detecting and controlling unit of interference signal frequency. The variable BEF outputs by removing only a signal of narrow band corresponding to the frequency band of interference signal among the received signal by varying the frequency eliminating band according to the control signal of the detecting and controlling unit of interference signal frequency. Thereby the loss of a CDMA signal is minimized.