Mitigating noise and obi in rfog networks
AssigneeARRIS Enterprises LLC
InventorsVenkatesh G. Mutalik, Marcel F. Schemmann
Life of this patent
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Abstract
A bi-directional optical transceiver includes multiple single mode optical ports and a multi-mode optical port. A multi-mode optical combiner combines single mode optical signals received at the single mode optical ports into a multi-mode optical signal at the multi-mode optical port. Each single mode optical signal has a distinct optical mode that does not interfere with the optical mode of the other single mode optical signals. A photo detector detects a total optical power of the plurality of single mode optical signals in the multi-mode optical signal. An amplifier is coupled to receive an output of the photo detector.
Claims15
1-3. (canceled)
A system in at least one of a headend or a node for detecting an optical beat interference (OBI) event in a two way optical communication path, the system comprising:
- at least one return receiver for receiving return signals transmitted from one or more groups of end user devices, the at least one return receiver including a photodetector coupled to the two way optical communication path for detecting return signals from the plurality of end user devices;
- a processor for:
- monitoring a spectrum of the return signals from each group of end users, and
- determining from the monitored spectrum of return signals if an OBI event has occurred for each respective group of end user devices;
- and
- a squelch activator for squelching a receiver output when an OBI event occurs at a respective at least one return receiver.
A system in at least one of a headend or a node for detecting an optical beat interference (OBI) event in a two way optical communication path, the system comprising:
- at least one return receiver for receiving return signals transmitted from one or more groups of end user devices, the at least one return receiver including a photodetector coupled to the two way optical communication path for detecting return signals from the plurality of end user devices;
- a processor for:
- monitoring a spectrum of the return signals from each group of end users, and
- determining from the monitored spectrum of return signals if an OBI event has occurred for each respective group of end user devices and triggering a high squelch event in case an OBI event has occurred;
- and
- a low squelch activator for triggering low squelch when a combined signal power at a respective return receiver indicates a quiescence state for each of the end user devices in a respective one of the at least one return receiver's group of end user devices.
Dependencies are inferred from the claim text.