CPC H04L 25/03006 (2013.01) [H04L 2025/0342 (2013.01)] | 16 Claims |
1. A method for a wireless receiver to demodulate a message, the method comprising:
a) receiving a message comprising message elements, each message element modulated, by a transmitter, according to a first modulation scheme, wherein the first modulation scheme comprises, for each message element, amplitude modulation multiplexed with phase modulation; and
b) demodulating each message element according to a second modulation scheme different from the first modulation scheme, wherein the second modulation scheme comprises, for each message element, QAM (quadrature amplitude modulation) comprising a first branch signal and an orthogonal second branch signal, wherein:
c) the first modulation scheme further comprises at least three predetermined amplitude levels;
d) wherein the amplitude modulation is according to the at least three predetermined amplitude levels; and
e) wherein the at least three predetermined amplitude levels are equally spaced apart.
|