Passive intermodulation (PIM) testing in distributed base transceiver station architecture

    公开(公告)号:US10608919B2

    公开(公告)日:2020-03-31

    申请号:US15430211

    申请日:2017-02-10

    Abstract: A passive intermodulation (PIM) tester is provided. The PIM tester includes at least one interface to couple the tester to a front-haul communication link used for communicating front-haul data to a remote radio head (RRH) having one or more antenna ports. The PIM tester includes a programmable processor, coupled to the interface, configured to execute software, wherein the software is operable to cause the tester to do the following: identify at least one tone in at least one downlink band of the remote radio head, wherein potential PIM products may appear in at least one uplink band of the remote radio head in response to the identified at least one tone; inject the identified at least one tone in the at least one downlink band of the remote radio head; and monitor the at least one uplink band for the potential PIM products from the injected at least one tone.

    METHODS AND EQUIPMENT FOR REDUCING POWER LOSS IN CELLULAR SYSTEMS

    公开(公告)号:US20190391192A1

    公开(公告)日:2019-12-26

    申请号:US16480818

    申请日:2018-02-07

    Abstract: A method is provided. The method comprises determining configuration data; wherein the configuration data comprises a resistance of a bypass circuit coupled between a remote radio head and a power cable; using the configuration data, determining the resistance of the power cable coupling a programmable power supply to the remote radio head mounted on a mounting structure, comprising: entering a calibration mode; setting an output voltage of the programmable power supply; measuring an output current of the programmable power supply; storing the output current; and determining the cable resistance; and storing the resistance of the power cable.

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