Phase correlated quadrature amplitude modulation

A method for transmitting a base band digital data signal having a bit period and a first bandwidth using a digital communication system, comprising:

• providing a carrier wave having a carrier amplitude and a carrier frequency with 0 bit data having a 0 bit mean amplitude and a 0 bit mean frequency and a 0 bit duration and 1 bit data having a 1 bit mean amplitude and a 1 bit mean frequency and a 1 bit duration;
• and
• synchronously modulating both the carrier amplitude and carrier frequency with the base band digital data signal, so as to reduce a bandwidth of the modulated carrier wave below the first bandwidth of the base band digital data signal;
• wherein a product of the 0 bit duration and a frequency excursion between the 1 bit mean frequency and the 0 bit mean frequency is equal to about ½ such that the frequency excursion produces a π phase shift between 1 bits having an odd number of 0 bits therebetween.

A method for transmitting a base band digital data signal having a bit period and a first bandwidth using a digital communication system, comprising:

• providing a wireless carrier wave having a carrier phase and a carrier frequency with 0 bit data having a 0 bit mean amplitude and a 0 bit mean frequency and a 0 bit duration and 1 bit data having a 1 bit mean amplitude and a 1 bit mean frequency and a 1 bit duration;
• and
• synchronously modulating both the carrier phase and carrier frequency with the base band digital data signal, so as to reduce a bandwidth of the modulated carrier wave below the first bandwidth of the base band digital data signal;
• wherein a product of the 0 bit duration and a frequency excursion between the 1 bit mean frequency and the 0 bit mean frequency is equal to about ½ such that the frequency excursion produces a π phase shift between 1 bits having an odd number of 0 bits therebetween.