  Instead of treating the noise as a detrimental effect, can we use it as an
information carrier? In this letter, we provide the conceptual and mathematical
foundations of wireless communication utilizing noise and random signals in
general. Mainly, the concept of noise modulation (NoiseMod) is introduced to
cover information transmission by both thermal noise and externally generated
noise signals. The performance of underlying NoiseMod schemes is evaluated
under both additive white Gaussian and fading channels and alternative NoiseMod
designs exploiting non-coherent detection and time diversity are proposed.
Extensive numerical and computer simulation results are presented to validate
our designs and theoretical derivations.
