Patent ID: 7856067

Claim:
A system for communicating an input data frame having a first segment and a second segment of input data, the system providing unequal coding and unequal modulation, the system comprising, an encoder for receiving the second segment and coding the second segment into coded data, the encoder unequally coding the input data frame for providing unequal coding, and a modulator for receiving the first segment as uncoded data and for receiving the coded data, the modulator modulating the uncoded data and coded data into electrical signals indicating symbols within a constellation space having predetermined respective points, point spacing between the points within the constellation space is unequal providing unequal modulation, wherein the first segment is on two data bits dl and d 2 , the second segment is on one data bit d 3 and coded data on bits e 3 and e 4 , and wherein bits dl, d 2 , e 3 , and e 4 are nibble bits b 1 , b 2 , b 3 , and b 4 modulated by the modulator, wherein most significant bits (MSB) b 1 and b 2 define interquadrant spacing and least significant bits (LSB) b 3 and b 4 define intraquadrant spacing, the interquadrant and intraquadrant spacing being unequal.