Overlapping windowing mechanism utilizing transmit waveform extensions
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United States of America Patent
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Dec 16, 2003
Grant Date -
Jul 17, 2003
app pub date -
Jan 4, 2002
filing date -
Jan 4, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A novel and useful windowing mechanism for reducing the out of band harmonics of an output transmit signal. The windowing mechanism functions to smooth the transition between two consecutive transmit waveforms. The mechanism of present invention is particularly useful in communication systems characterized by consecutively transmitted symbols whereby the concatenation of transmitted waveforms causes discontinuities between symbols. The windowing mechanism is operative to reduce the effect of these discontinuities to reduce out of band harmonics of the transmitted output signal. The windowing mechanism extends each transmit waveform both earlier and later in time thus creating extending waveform portions on either end of the transmit waveform. The extended portions are then multiplied by a suitable windowing function and the result is summed with the next transmit waveform.
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