A PILOT TRANSMITTER IN CODE DIVISION MULTIPLE ACCESS SYSTEM

摘要

PURPOSE: A pilot transmitter of CDMA system is provided to ensure the service consistency between the cellular using CDMA technique and the adjacent base station whose total number of frequency assignment of PCS. CONSTITUTION: A sector interface card(100) modulates an output signal of a forward link into an intermediate frequency band and outputs it by sectors. A transmitter(200) up-converts the intermediate frequency signals of each sector modulated into signals of a high frequency band. A high power amplifier(300) amplifies the high frequency signals of each sector up-converted into an appropriate level of signal suitable for each output terminal. A surface acoustic wave filter(400) filters the signals of each sector amplified and transmits them to transmitting antenna.