Activating interference signal rejection filter path based on detection of an interference signal in a wireless distribution system (WDS)
View Patent ↗Embodiments of the disclosure relate to activating an interference signal rejection filter path based on detection of an interference signal in a wireless distribution system (WDS). In this regard, in one aspect, a filter path selection circuit is configured to activate an interference rejection filter path configured to suppress a predefined interference signal when the predefined interference signal is detected in a received radio frequency (RF) signal. In another aspect, the filter path selection circuit is configured to detect the predefined interference signal by comparing a measured power level of the predefined interference signal against a predefined power threshold. By activating the interference rejection filter path to suppress the predefined interference signal based on detection of the predefined interference signal, it is possible to dynamically respond to the predefined interference signal that may randomly appear in the WDS, thus providing an enhanced overall RF performance in the WDS.
1. A wireless distribution system (WDS), comprising:
a central unit configured to:
communicate a plurality of downlink communications signals via a plurality of downlink communications mediums; and
receive a plurality of uplink communications signals via a plurality of uplink communications mediums; and
a plurality of remote units configured to:
receive the plurality of downlink communications signals via the plurality of downlink communications mediums; and
communicate the plurality of uplink communications signals via the plurality of uplink communications mediums;
wherein each of the plurality of remote units comprises a filter path selection system that comprises:
a filter path selection circuit, comprising:
an interference rejection filter path comprising a first radio frequency (RF) filter, the first RF filter configured to:
receive an RF signal from a first filter path input provided in the interference rejection filter path and communicatively coupled to one or more client devices in the WDS; and
filter the received RF signal at a first rejection level to generate a first filter path output signal;
a pass filter path comprising a second RF filter, the second RF filter configured to:
receive the RF signal from a second filter path input provided in the pass filter path and communicatively coupled to the one or more client devices; and
filter the received RF signal at a second rejection level lower than the first rejection level to generate a second filter path output signal; and
a controller configured to:
determine whether the RF signal comprises a predefined interference signal based on a measured power level of the predefined interference signal;
couple the RF signal to the first filter path input of the interference rejection filter path if the measured power level of the predefined interference signal is higher than a predefined power threshold; and
couple the RF signal to the second filter path input of the pass filter path if the measured power level of the predefined interference signal is lower than or equal to the predefined power threshold; and
a power measurement circuit comprising a power detector, the power detector configured to:
determine the measured power level of the predefined interference signal in the RF signal; and
provide the measured power level of the predefined interference signal to the controller.
2. The WDS of claim 1 , wherein each remote unit among the plurality of remote units is configured to communicate the first filter path output signal as an uplink communications signal among the plurality of uplink communications signals if the measured power level of the predefined interference signal is higher than the predefined power threshold.
3. The WDS of claim 2 , wherein each remote unit among the plurality of remote units is configured to communicate the second filter path output signal as an uplink communications signal among the plurality of uplink communications signals if the measured power level of the predefined interference signal is less than or equal to the predefined power threshold.
4. The WDS of claim 2 , wherein:
the central unit comprises an electrical-to-optical (E/O) converter configured to provide the plurality of downlink communications signals as a plurality of optical downlink communications signals, respectively; and
the plurality of remote units comprises a plurality of remote unit optical-to-electrical (O/E) converters configured to receive the plurality of optical downlink communications signals, respectively.
5. The WDS of claim 4 , wherein:
the plurality of remote units comprises a plurality of remote unit electrical-to-optical (E/O) converters configured to provide the plurality of uplink communications signals as a plurality of optical uplink communications signals, respectively; and
the central unit comprises an optical-to-electrical (O/E) converter configured to receive the plurality of optical uplink communications signals, respectively.
6. The WDS of claim 1 , wherein each remote unit among the plurality of remote units is configured to communicate the second filter path output signal as an uplink communications signal among the plurality of uplink communications signals if the measured power level of the predefined interference signal is less than or equal to the predefined power threshold.
7. The WDS of claim 6 , wherein:
the central unit comprises an electrical-to-optical (E/O) converter configured to provide the plurality of downlink communications signals as a plurality of optical downlink communications signals, respectively; and
the plurality of remote units comprises a plurality of remote unit optical-to-electrical (O/E) converters configured to receive the plurality of optical downlink communications signals, respectively.
8. The WDS of claim 7 , wherein:
the plurality of remote units comprises a plurality of remote unit electrical-to-optical (E/O) converters configured to provide the plurality of uplink communications signals as a plurality of optical uplink communications signals, respectively; and
the central unit comprises an optical-to-electrical (O/E) converter configured to receive the plurality of optical uplink communications signals, respectively.
9. The WDS of claim 1 , wherein the plurality of remote units comprises:
a plurality of remote unit optical-to-electrical (O/E) converters configured to receive the plurality of downlink communications signals, respectively;
a plurality of remote unit electrical-to-optical (E/O) converters configured to provide the plurality of uplink communications signals as a plurality of optical uplink communications signals, respectively.
10. The WDS of claim 9 , wherein each remote unit comprises at least one radio transceiver, and wherein each remote unit is configured to communicate with client devices within range of the remote unit.
11. The WDS of claim 1 , wherein each remote unit comprises at least one radio transceiver, and wherein each remote unit is configured to communicate with client devices within range of the remote unit.
12. A wireless distribution system (WDS), comprising:
a plurality of optical communications mediums; and
a plurality of remote units comprising a plurality of electrical-to-optical (E/O) converters and coupled to the plurality of optical communications mediums, the plurality of remote units configured to:
receive the plurality of downlink communications signals via the plurality of optical communications mediums; and
communicate the plurality of uplink communications signals via the plurality of optical communications mediums;
wherein each of the plurality of remote units comprises a filter path selection system that comprises:
a filter path selection circuit, comprising:
an interference rejection filter path comprising a first radio frequency (RF) filter, the first RF filter configured to:
receive an RF signal from a first filter path input provided in the interference rejection filter path and communicatively coupled to one or more client devices in the WDS; and
filter the received RF signal at a first rejection level to generate a first filter path output signal;
a pass filter path comprising a second RF filter, the second RF filter configured to:
receive the RF signal from a second filter path input provided in the pass filter path and communicatively coupled to the one or more client devices; and
filter the received RF signal at a second rejection level lower than the first rejection level to generate a second filter path output signal; and
a controller configured to:
determine whether the RF signal comprises a predefined interference signal based on a measured power level of the predefined interference signal;
couple the RF signal to the first filter path input of the interference rejection filter path if the measured power level of the predefined interference signal is higher than a predefined power threshold; and
couple the RF signal to the second filter path input of the pass filter path if the measured power level of the predefined interference signal is lower than or equal to the predefined power threshold; and
a power measurement circuit comprising a power detector, the power detector configured to:
determine the measured power level of the predefined interference signal in the RF signal; and
provide the measured power level of the predefined interference signal to the controller.
13. The WDS of claim 12 , wherein each remote unit among the plurality of remote units is configured to communicate the first filter path output signal as an uplink communications signal among the plurality of uplink communications signals if the measured power level of the predefined interference signal is higher than the predefined power threshold.
14. The WDS of claim 13 , wherein each remote unit among the plurality of remote units is configured to communicate the second filter path output signal as an uplink communications signal among the plurality of uplink communications signals if the measured power level of the predefined interference signal is less than or equal to the predefined power threshold.
15. The WDS of claim 12 , wherein each remote unit among the plurality of remote units is configured to communicate the second filter path output signal as an uplink communications signal among the plurality of uplink communications signals if the measured power level of the predefined interference signal is less than or equal to the predefined power threshold.
16. The WDS of claim 15 , wherein each remote unit comprises at least one radio transceiver, and wherein each remote unit is configured to communicate with client devices within range of the remote unit.
17. The WDS of claim 12 , wherein each remote unit comprises at least one radio transceiver, and wherein each remote unit is configured to communicate with client devices within range of the remote unit.