Echo cancellation in multiple port full duplex (FDX) nodes and amplifiers

A system comprising:

• a memory storage;
• and
• a processing unit coupled to the memory storage, wherein the processing unit is configured to:
• provide a plurality of signals to a cancelation device, wherein the cancelation device comprises a plurality of phase shifters, wherein each of the plurality of signals are configured to provide the cancelation device with one of a plurality of different configurations of the plurality of phase shifters, wherein the plurality of phase shifters comprise a first phase shifter disposed in a first input port of a first combiner/splitter, a second phase shifter disposed in a first input port of a second combiner/splitter, and a third phase shifter disposed in a first input port of a third combiner/splitter and wherein the processing unit being operative to provide the plurality of signals to the cancelation device comprises the processing unit being configured to:
• provide a first signal that causes a first switch of the first phase shifter of the plurality of phase shifters to place a first shifting element of the first phase shifter in a state to shift a first incoming signal to provide the cancelation device with a first configuration of the plurality of different configurations, and
• provide a second signal that causes a second switch of the second phase shifter of the plurality of phase shifters to place a second shifting element of the second phase shifter in another state to not shift a second incoming signal to provide the cancelation device with a second configuration of the plurality of different configurations, the second configuration being different than the first configuration,
• receive an effective echo power value corresponding to the plurality of different configurations of the plurality of phase shifters,
• select, based on the effective echo power value corresponding to each of the plurality of different configurations of the plurality of phase shifters, a configuration from the plurality of different configurations of the plurality of phase shifters corresponding to a lowest effective echo power value for the cancelation device, and
• operate the cancelation device at the selected configuration one of the plurality of different configurations.

A non-transitory computer-readable medium that stores a set of instructions which when executed perform method executed by the set of instructions comprising:

• providing a plurality of signals to a cancelation device, wherein the cancelation device comprises a plurality of phase shifters, wherein the cancelation device comprises a first level comprising a first combiner/splitter and a second combiner/splitter and a second level comprising a third combiner/splitter being fed by the first combiner/splitter and the second combiner/splitter, wherein the plurality of phase shifters comprise a first phase shifter disposed in a first input port of the first combiner/splitter, a second phase shifter disposed in a first input port of the second combiner/splitter, and a third phase shifter disposed in a first input port of the third combiner/splitter, wherein each of the plurality of signals are configured to provide the cancelation device with one of a plurality of different configurations of the plurality of phase shifters, and wherein providing the plurality of signals to the cancelation device comprises:
• providing a first signal that causes a first switch of the first phase shifter of the plurality of phase shifters to place a first shifting element of the first phase shifter in a state to shift a first incoming signal to provide the cancelation device with a first configuration of the plurality of different configurations, and
• providing a second signal that causes a second switch of the second phase shifter of the plurality of phase shifters to place a second shifting element of the second phase shifter in another state to not shift a second incoming signal to provide the cancelation device with a second configuration of the plurality of different configurations, the second configuration being different than the first configuration;
• receiving an effective echo power value corresponding to the plurality of different configurations of the plurality of phase shifters;
• selecting, based on the effective echo power value corresponding to each of the plurality of different configurations of the plurality of phase shifters, a configuration from the plurality of different configurations of the plurality of phase shifters corresponding to a lowest effective echo power value for the cancelation device;
• and
• operating the cancelation device at the selected configuration of the plurality of different configurations.