Jam proof information encoding?

[Yothu]

Taken from Dr. Chalko's Article: Is choice or chance the essence of the Universe?

The other necessity that arises from the need to protect yourself seems to be encoding your intellect and memory so that they both become "jam proof". Direct amplitude or frequency modulation encoding is clearly not suitable, because they are too easily disturbed. The discrete phase-encoding spread among many natural forms of oscillation over a wide frequency range (spectrum) seems a very attractive possibility, not only because it is robust to disturbances but also because it enables you to achieve a very high density of information storage.

Can somebody who's competent in the field put it into different words? I am experiencing a hard time understanding this particular passage.

[Alisima]

You have a carrier wave. Let's say a sinus wave. That wave has 3 parameters: amplitude, frequency and phase. Amplitude being the strength of the wave, frequency the recurrence and phase the displacement of the sinus wave.

So with AM, amplitude modulation, both the frequency and phase stay fixed and only the amplitude of the carrier wave modulates.

With FM, frequency modulation, both the amplitude and phase stay fixed (or fixed enough) and only the frequency of the carrier wave modulates.

With PM, phase modulation, both the frequency and amplitude stay fixed (or fixed enough) and only the phase of the carrier wave modulates.