Transmitter control in communication systems
First Claim
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1. A transceiver comprising:
- a first transmitter;
a first receiver;
a second transmitter; and
a second receiver, wherein;
the first transmitter comprises an equalizer, wherein the equalizer is in compliance with one or more of clauses 72.7.1.10 and 72.7.1.11 of IEEE Std 802.3ap-2007 and wherein electrical characteristics of the first transmitter are in compliance with clause 72.7.1 of IEEE Std 802.3ap-2007;
the first receiver comprises;
clock and data recovery logic to determine error properties of a signal received from a third transmitter;
control channel decoder to decode control signals received from the third transmitter;
remote transmit adaptation engine to determine equalizer settings of an equalizer of the third transmitter based in part on the error properties and the control signals; and
a transmit control logic to request to adjust settings applied by the equalizer of the first transmitter, the settings received from the third transmitter;
the second transmitter comprises an equalizer, wherein the equalizer is in compliance with one or more of clauses 72.7.1.10 and 72.7.1.11 of IEEE Std 802.3ap-2007 and wherein electrical characteristics of the second transmitter are in compliance with clause 72.7.1 of IEEE Std 802.3ap-2007;
the second receiver comprises;
clock and data recovery logic to determine error properties of a signal received from a fourth transmitter;
control channel decoder to decode control signals received from the fourth transmitter;
remote transmit adaptation engine to determine equalizer settings of an equalizer of the fourth transmitter based in part on the error properties and the control signals; and
a transmit control logic to request to adjust settings applied by the equalizer of the second transmitter, the settings received from the fourth transmitter; and
the remote transmit adaptation engine of the first receiver and the remote transmit adaptation engine of the second receiver are to independently determine equalizer settings of the third and fourth transmitters.
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Abstract
Techniques are described to adaptively adjust the equalizer settings of each transmitter in a transmitter-receiver pair. The transmitter-receiver pair can be used at least with implementations that comply with 40GBASE-CR4 or 100GBASE-CR10. For implementations that comply with 40GBASE-CR4, equalizer settings of four transmitters may be independently established.
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Citations
19 Claims
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1. A transceiver comprising:
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a first transmitter; a first receiver; a second transmitter; and a second receiver, wherein; the first transmitter comprises an equalizer, wherein the equalizer is in compliance with one or more of clauses 72.7.1.10 and 72.7.1.11 of IEEE Std 802.3ap-2007 and wherein electrical characteristics of the first transmitter are in compliance with clause 72.7.1 of IEEE Std 802.3ap-2007; the first receiver comprises; clock and data recovery logic to determine error properties of a signal received from a third transmitter; control channel decoder to decode control signals received from the third transmitter; remote transmit adaptation engine to determine equalizer settings of an equalizer of the third transmitter based in part on the error properties and the control signals; and a transmit control logic to request to adjust settings applied by the equalizer of the first transmitter, the settings received from the third transmitter; the second transmitter comprises an equalizer, wherein the equalizer is in compliance with one or more of clauses 72.7.1.10 and 72.7.1.11 of IEEE Std 802.3ap-2007 and wherein electrical characteristics of the second transmitter are in compliance with clause 72.7.1 of IEEE Std 802.3ap-2007; the second receiver comprises; clock and data recovery logic to determine error properties of a signal received from a fourth transmitter; control channel decoder to decode control signals received from the fourth transmitter; remote transmit adaptation engine to determine equalizer settings of an equalizer of the fourth transmitter based in part on the error properties and the control signals; and a transmit control logic to request to adjust settings applied by the equalizer of the second transmitter, the settings received from the fourth transmitter; and the remote transmit adaptation engine of the first receiver and the remote transmit adaptation engine of the second receiver are to independently determine equalizer settings of the third and fourth transmitters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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determining first equalizer settings of a first transmitter of a first signal based in part on error properties of the first signal using clock and data recovery for the first signal and also based in part on control signals from the first transmitter determined using a first control channel decoding, wherein the first equalizer used by the first transmitter is in compliance with one or more of clauses 72.7.1.10 and 72.7.1.11 of IEEE Std 802.3ap-2007; determining second equalizer settings of a second transmitter of a second signal based in part on error properties of the second signal using clock and data recovery for the second signal and also based in part on control signals from the second transmitter determined using a control channel decoding, wherein the second equalizer used by the second transmitter is in compliance with one or more of clauses 72.7.1.10 and 72.7.1.11 of IEEE Std 802.3ap-2007 and wherein determining first equalizer settings is independent from determining second equalizer settings; requesting to adjust settings applied by the first equalizer of the first transmitter; and requesting to adjust settings applied by the second equalizer of the second transmitter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification