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US 10,382,125 B2Granted
Closed loop module control for communication
AssigneeInphi Corporation
InventorsTodd Rope, Radhakrishnan L. Nagarajan
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Abstract
The present invention is directed to communication systems and methods. According to an embodiment, a receiving optical transceiver determines signal quality for signals received from a transmitting optical transceiver. Information related to the signal quality is embedded into back-channel data and sent to the transmitting optical transceiver. The transmitting optical transceiver detects the presence of the back-channel data and adjusts one or more of its operating parameters based on the back-channel data. There are other embodiments as well.
Claims15
An optical transceiver apparatus comprising:
- an optical receiver for converting incoming optical signals to incoming electrical signals;
- a digital signal processor (DSP) configured to analyze the incoming electrical signals and to generate a first signal quality value characterizing the incoming electrical signals;
- a forward-error correction (FEC) module configured to process the incoming electrical signals and to generate a second signal quality value characterizing an error rate associated with the incoming electrical signals;
- a control module configured to generate back-channel data based at least on the first signal quality value and the second signal quality value, the control module further being configured to insert the back-channel data to an outgoing data stream, the back channel data segment being positioned at a predetermined location of an encoded data frame for processing by a compatible device;
- and
- an optical transmitter for generating output optical signals based on the outgoing data stream,
- wherein the outgoing data stream indicates a first pulse amplitude modulation (PAM) parameter adjustment comprising lane skew.
4 more elements
Dependencies are inferred from the claim text.