Quadrature Noise Modulation for Robust and Flexible Communication

Abstract

This letter introduces two novel noise modulation (NoiseMod) signaling schemes designed to enhance the bit rate of the classical binary NoiseMod (B-NoiseMod) approach. Quadrature NoiseMod (Q-NoiseMod) adds a new dimension to B-NoiseMod by utilizing two orthogonal noise bases to encode two bits per symbol, while mean-variance NoiseMod (MV-NoiseMod) exploits the statistical means of noise distributions as an additional symbol dimension. Closed-form theoretical bit error probability expressions are derived for all proposed schemes. Numerical simulations confirm that both Q-NoiseMod and MV-NoiseMod significantly outperform rate-equivalent B-NoiseMod, with MV-NoiseMod achieving an additional performance gain over Q-NoiseMod under AWGN channels.