Importance

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Abstract

Disclosed is an apparatus and a method for generating a local signal and a Radio Access Station (RAS) using the same in a wireless telecommunication system. The apparatus includes: an Intermediate Frequency (IF) local unit for generating an IF local signal; and a Radio Frequency (RF) local unit for generating an RF local signal, wherein the IF local unit comprises: a first frequency synthesizer for generating the IF local signal; and a first distributor for distributing the IF local signal into an IF local signal for transmission and an IF local signal for reception, and wherein the RF local unit comprises: a second frequency synthesizer for generating the RF local signal; and a switch for distinguishing the RF signal into an RF local signal for transmission and an RF local signal for reception, and switching the RF local signal for transmission to a transmission path and the RF local signal for reception to a receive path. An optimized circuit configuration is provided so that the local signals for transmission/reception can be generated by a single frequency synthesizer, and the distributor is used instead of the switch in generating the IF local signals for transmission/reception, so that spurious emissions due to the operation of the switch are prevented from occurring, and the characteristic of phase noise can be improved.

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First Claim