Multi-system access platform
A multi-system and platform technology, applied in transmission systems, radio relay systems, communication between multiple stations, etc., can solve the problems of doubling the cost of network construction and increasing the complexity of engineering wiring, saving system costs and reducing The effect of sophistication
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[0027] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0028] see figure 1 , the multi-system access platform in the preferred embodiment of the present invention has three connection ports P1, P2, and P3 close to the base station, which are respectively used to process three-way signals, one of which is GSM800 frequency band, and the other two are GSM1900 frequency bands The signal; has uplink, downlink and direct link; also has the connection ports RX1 to RX4 of the four antenna feeders fed into the uplink, and the connection port TX1 of the four antenna feeders output by the downlink to TX4, and a pass-through port COM that is a pass-through link.
[0029] When the signal is downlink, the three signals input by the three connection ports P1, P2, and P3 of the base station are further processed independently through the direct link and the downlink:
[0030] In the direct link, at first the signals of the two...
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