Coded modulation and coherent frequency-hopped CDMA with wavelets

Recently, we entertained the notion of using orthonormal scaling functions and wavelets as shift orthogonal envelope waveforms for modulation. Subsequently, we addressed the issue of distribution of dimensions in time. Here we propose a novel coded modulation scheme where redundancy is introduced in the basis used for modulation. The technique of wavelet orthogonal frequency division multiplexing (WOFDM) in conjunction with frequency hopping is subsequently proposed for synchronous code division multiple access (FH/S-CDMA). Finally, we propose a novel low probability of intercept (LPI) modulation scheme based on a pseudo random selection of basis functions for modulation spanning the same frequency channel