| 摘要 |
PURPOSE: An interface device of a base station is provided to minimize the loss by a transmission cable by interfacing a transceived signal through an RF processing unit and intermediate frequency. CONSTITUTION: An interface device(202) of a base station comprises digital up converters(226a,226b), a digital/analog converter, a digital combiners(230a,230b) and digital down converters(228a,228b). The digital up-converters up-convert the frequency of a transmission IQ signal according to the frequency allocation for the IQ signal of a baseband. The digital/analog converter converts the transmission IQ signal having the up-converted frequency into a transmission IQ signal of the first serial intermediate frequency, and generates plural analog output signals of the first intermediate frequency so as to be transmitted through plural paths by performing the analog conversion for the transmission IQ signal of the first intermediate frequency.
|
