INTERFACE SYSTEM BETWEEN A CHANNEL CARD AND AN INTERMEDIATE FREQUENCY END IN A CDMA BTS, ESPECIALLY CONCERNED WITH EXECUTING HIGH SPEED SERIAL BTL COMMUNICATION BY APPLYING A PARALLEL-TO-SERIAL INTERFACE METHOD FOR A CHANNEL CARD AND A SERIAL-TO-PARALLEL INTERFACE METHOD FOR AN IF CARD

摘要

PURPOSE: An interface system between a channel card and an IF(Intermediate Frequency) card in a CDMA BTS(Base station Transceiver Subsystem) is provided to save the space of a channel card and an IF card and backplane space by applying a parallel-to-serial interface method for the channel card and a serial-to-parallel interface method for the IF card so as to execute high speed serial BTL communication. CONSTITUTION: In an interface system between a channel card(100) and an IF card(200), the channel card(100) comprises a high speed parallel-to-serial level converter(110) that converts parallel signals into serial signals, the IF card(200) comprises a high speed serial-to-parallel converter(120) that converts serial signals into parallel signals. Accordingly, the space of the channel card(100) and the IF card(200) and backplane space can be saved. Also the number of edge connectors can be reduced as the number of interface signals is reduced.