Patent ID: 7499505

Claim:
A method for adjusting a received point for a tone received by a receiver, wherein the received point has an X and a Y coordinate, and wherein the tone represents a number of bits greater than three, the method comprising: determining if the received point lies outside of a specified region, wherein the specified region is dependent upon the number of bits, wherein the specified region is square in shape and is described by two values, wherein a first value, MAXX, describes a maximum extent of the specified region along an X-axis, and wherein a second value, MAXY, describes a maximum extent of the specified region along a Y-axis; applying a transformation to the received point if the received point lies outside of the specified region, wherein the transformation comprises shifting the received point into the specified region, the applying comprises: if the X coordinate is greater than MAXX, then the X coordinate is set to MAXX; if the X coordinate is less than −MAXX, then the X coordinate is set to −MAXX; if the Y coordinate is greater than MAXY, then the Y coordinate is set to MAXY; and if the Y coordinate is less than −MAXY, then the Y coordinate is set to −MAXY; providing the received point transformed to a decoder in the receiver if the received point is transformed; and providing the received point untransformed to the decoder if the received point lies inside of the specified region.