Coherent transceiver architecture

A receiver, comprising:

• an ingress signal path comprising an ingress line-side interface and an ingress host-side interface, the ingress signal path configured to receive an analog signal vector at the ingress line-side interface, to convert the analog signal vector to a digital signal vector, to demodulate the digital signal vector to generate a digital receive signal, and to output the digital receive signal at the ingress host-side interface, the ingress signal path comprising a plurality of different ingress path clock domains operating according to different ingress path clock signals having different clock rates;
• an ingress-side data storage buffer between two adjacent ingress path clock domains, the ingress-side data storage buffer configured to prevent loss of data samples when an ingress path signal transitions between the two adjacent ingress path clock domains;
• and
• clock and timing circuitry configured to receive a single reference clock signal, to generate the plurality of ingress path clock signals from the single reference clock, and to provide the plurality of ingress path clock signals to different components of the ingress signal path in the plurality of different ingress path clock domains.

A transceiver, comprising:

• an egress signal path comprising an egress line-side interface and an egress host-side interface, the egress signal path configured to receive a digital transmit signal at the egress host-side interface, to modulate the digital transmit signal to generate a modulated digital transmit signal, to convert the modulated digital transmit signal to an analog transmit signal vector, and to output the analog transmit signal vector corresponding to the digital transmit signal at the egress line-side interface, the egress signal path comprising a plurality of different egress path clock domains operating according to different egress path clock signals having different clock rates;
• an egress-side data storage buffer between two adjacent egress path clock domains, the egress-side data storage buffer configured to prevent loss of data samples when an egress path signal transitions between the two adjacent egress path clock domains;
• an ingress signal path comprising an ingress line-side interface and an ingress host-side interface, the ingress signal path configured to receive an analog receive signal vector at the ingress line-side interface, to cover the analog receive signal vector to a digital receive signal vector, to demodulate the digital receive signal vector to generate a digital receive signal, and to output a digital receive signal at the ingress host-side interface, the ingress signal path comprising a plurality of different ingress path clock domains operating according to different ingress path clock signals having different clock rates;
• an ingress-side data storage buffer between two adjacent ingress path clock domains, the ingress-side data storage buffer configured to prevent loss of data samples when an ingress path signal transitions between the two adjacent ingress path clock domains;
• and
• clock and timing circuitry configured to receive a single reference clock signal, to generate the plurality of ingress path clock signals and the plurality of egress path clock signals from the single reference clock, to provide the plurality of ingress path clock signals to different components of the ingress signal path in the plurality of different ingress path clock domains, and to provide the plurality of egress path clock signals to different components of the egress signal path in the plurality of different egress path clock domains.