| 摘要 |
PURPOSE: A digital processing device within a base station in a mobile subscribing network system is provided to adapt 100MHz bandwidth to W-CDMA system using 2.30-2.33GHz reverse channel and WLL system using 2.37-2.40GHz forward channel. CONSTITUTION: A TDMA(Traffic data Mux and Demux Assembly)(110) separates ADPCM, PCM, ISDN data in the traffic data, which is transmitted from RLIU(200) to EI PCM highway frame as a trunk interface stage, transmits the separated data to the corresponding channel cards, or allocates the data transmitted from the respective channel cards to E1 PCM highway frame and transmits the allocated data to the RLIU(200). A CDCA(CDMA Digital Card Assembly)(120) converts the forward data transmitted from the TDMA(110) into W-CDMA, changes the converted data into analog signal and then transmits the analog signal, or converts the inputted I(In-Phase), Q(Quadrature) analog signals by W-CDMA and then transmits the converted signal to the TMDA(110). A CDBB(CDMA BackBoard)(130) is comprised of hardwired patterns and adds the I,Q analog signal outputted from the CDCA(120). A BICA(Baseband and Conversion Board Assembly)(140) converts the I,Q analog signals outputted from the CDBB(130) by QPSK and then transmits IF signal of 140MHz. A power unit(150) provides ± 12V,+5V power by receiving -48V.
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