Patent ID: 8553786

Claim:
A method of communicating a data value and pilot tone within the same communication sub-carrier of a communication channel, comprising: selecting a first reference phase corresponding to the data value; wherein the selecting the first reference phase includes retrieving a phase corresponding to the data value from a table, the table mapping a set of data values to a set of reference phases; generating a pilot tone having the first reference phase; transmitting the generated pilot tone; receiving the transmitted pilot tone; determining a phase of the received pilot tone; determining the data value from the determined phase of the received pilot tone; wherein the determining of the data value includes: determining from the set of reference phases, a second reference phase that is closest to the determined phase of the received pilot tone; and retrieving a data value corresponding to the second reference phase from the table; storing the determined data value in an electronic storage medium; training the communication channel to establish a synchronized phase; determining a difference between the determined phase of the received pilot tone and the second reference phase; and in response to the difference being greater than a selected threshold, repeating training and transmitting steps.