td-scdma base station used in cable tunnel
A TD-SCDMA, cable tunnel technology, applied in the field of base station equipment, to reduce the impact, reduce bit errors, and overcome the problem of signal attenuation
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[0023] The composition of the original TD-SCDMA base station is as follows: figure 2 shown. The TD-SCDMA base station mainly implements the debugging and demodulation of electrical signals and the reception / transmission of wireless signals. The electrical signal sent from the ground device 4 is transmitted to the TD-SCDMA base station through the cable, and then transmitted to the modulation and demodulation module 2 through the internal transceiver interface module 3. The reference clock provided by the clock module is used for frequency modulation to generate a high-frequency signal and amplifies it. Finally, when the electronic switch 1 is in the transmitting mode, it is converted into a wireless signal through the antenna and transmitted. The transceiver interface module 3 is mainly composed of a transceiver circuit composed of a filter and an operational amplifier, so as to correctly receive the analog signal in the cable or convert the internal electrical signal into a...
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