71.
A New Wavelet-based Multiplex System Multiresolution Division Multiplex (MRDM)
An original multiplex
scheme is introduced, which is based on Mallat’s multiresolution formulation of
wavelet systems. This system is adaptable and its implementation is well
matched to digital signal processors and computers. The approach termed
multiresolution division multiplex (MRDM) is intensive in signal processing
(SP) tools, extremely flexible and can combine a variety of tributaries at
different bit rates. A broad variety of orthogonal wavelet systems can endow
with MRDM and the channel waveforms, and consequently the spectral shape and
system performance depend upon the selected wavelets. Demultiplex can be done
efficiently, since the number of floating multiplications and additions
increase only linearly with the length of signals. A Haar-based MRDM scheme is
presented to illustrate the versatility of this new multiplex approach.