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Work in progress associated with developing advanced mobile transceivers is reported. The goal is to produce efficient compact data-compatible systems. Several methods under investigation are described, including the use of digital signal processing.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Bateman et al. (2003) studied this question.