Patent ID: 8665985

Claim:
A method for enhancing an existing communication system, said method comprising: summing a M-QAM pseudo-orthogonal QPSK secondary signal to a primary signal to create a combined signal, said primary signal being said existing communication system signal, said combined signal being the vector sum of said primary signal and said secondary signal; selecting said secondary signal so said combined signal conforms to said primary signal existing specifications, wherein said selecting includes selecting modulation type, power level, frequency spectrum, phase, and timing; transmitting said combined signal instead of said primary signal; receiving said combined signal; converting received said combined signal to I,Q digital samples; extracting said primary signal information from said I,Q digital samples; and extracting said secondary signal information from said, I,Q digital samples, wherein said extracting said secondary signal information comprises: downconverting said I,Q digital samples to baseband I,Q digital samples; and discarding said baseband I,Q samples whose amplitude or phase exceed an edit threshold value, said threshold value based on said secondary signal constellation points and current SNR.