System and method for frequency division multiplexed high speed physical layer devices

摘要

A system and method for frequency division multiplexed high speed physical layer devices. A next generation Ethernet device can be generated through reuse of existing architectures. Multiple instantiations of an existing architecture can be supported on a given wire pair by frequency division multiplexing on a number of carriers. The multiple instantiations can enable multiple modes that can support different configurations, variable rates, and energy efficient Ethernet.

主权项

1. A 40 Gbit/s Ethernet physical layer device, comprising:
a demultiplexer that demultiplexes a 40 Gbit/s data stream into four 10 Gbit/s data streams; four transmitters that implement a 10GBASE-T signaling scheme, each of the four transmitters configured to transmit a respective one of the four 10 Gbit/s data streams; a first mixer that shifts a first output of a first of the four transmitters to a first frequency spectrum different from a base frequency spectrum; a second mixer that shifts a second output of a second of the four transmitters to a second frequency spectrum different from the base frequency spectrum; a third mixer that shifts a third output of a third of the four transmitters to a third frequency spectrum different from the base frequency spectrum; and a combiner that combines at least part of the first, second and third outputs and at least part of a fourth output from the fourth of the four transmitters for transmission on a single twisted wire pair, wherein the 40 Gbit/s physical layer device has a first operating mode when the four transmitters are activated, and a second operation mode when only a subset of the four transmitters are activated, wherein one of the first open ting mode and the second operating mode is selected based on a type of cabling that includes the single twisted wire pair.