Multidimensional signaling for bandlimited channels

摘要

We focus on the issue of distribution of dimensions in time,describing a method, suited to different types of envelope functionsused for modulation, that can generate an almost arbitrary distributionof dimensions in time with spectral efficiencies near the Nyquist limit.Subsequently, we propose a modulation scheme whereby the distribution ofdimensions in time is used to carry additional information in the samebandwidth (BW). The purpose of this paper is to present systematicmethods based on the theory of wavelets and filter banks to generatealmost arbitrary distributions of dimensions in time, achieving thehighest spectral efficiency in a given BW. An application to codedmodulation is examined