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Implementation of the transparent tone-in-band (TTIB) spectral manipulation technique is described, with particular attention given to the mechanism of feedforward subband recombination. It is shown that transparency of TTIB can be maintained for a wide variety of input signal types. Extremely rapid and accurate subband recombination can be achieved by correct choice of filter shape. Application of TTIB are discussed, ranging from inband signaling on public telephone lines to DC offset compensation for direct conversion transceivers.>
A. Bateman (Mon,) studied this question.