Time domain spreading method and apparatus for a UWB receiver comprising fast fourier transform and exchange of real and imaginary complex signal components
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United States of America Patent
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Feb 5, 2008
Grant Date -
Jun 22, 2006
app pub date -
Dec 20, 2004
filing date -
Dec 20, 2004
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Abstract
A time domain spreading method and apparatus for a UWB receiver are provided. Wherein, a series of received symbol signals are received by the UWB receiver, and transformed by the fast Fourier transform to obtain a series of transformed signals Y(m) according to one of the received symbol signals. Y(m)=Y.sub.1(m)+jY.sub.Q(m), and m is a positive integer more than zero. The real part and imaginary part of the transferred signals are exchanged and the exchanged signals are inversely outputted to obtain a plurality of despreading received data signals X(m), and X(m)=Y.sub.Q(-m)+jY.sub.1(-m).
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