Patent ID: 9667315
Date: 2017-05-30
CPC Classifications: H04B

Claim:
1. A method for communicating data from a plurality of endpoint devices to a collector device over a power distribution line, the method comprising: detecting an undesirable post modulation of a communication from one of the plurality of endpoint devices and a related loss of orthogonality between multiple orthogonal frequency sub-channels for a communication from an endpoint device of the plurality of endpoint devices, wherein the undesirable post modulation includes inter-channel interference between sub-channels, the communication from the endpoint device of the plurality of endpoint devices is encoded using frequency shift keying (FSK) and the loss of orthogonality is a result of amplitude modulation caused by undesirable post modulation; and in response to detecting occurrences of the undesirable post modulation of the communication from the one of the plurality of endpoint devices to the collector device over the power distribution line correlating with occurrences of a bit error rate exceeding a threshold error rate, selecting for the endpoint device of the plurality of endpoint devices, a spacing between the multiple orthogonal frequency sub-channels for future communication, wherein selecting the spacing includes selecting a subset of the sub-channels that will not be used.