Ultra-wideband signal receiver using frequency sub-bands
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United States of America Patent
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Issued Date -
Oct 27, 2005
app pub date -
Dec 16, 2004
filing date -
Jun 25, 2002
priority date (Note) -
Abandoned
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Abstract
A signal receiver suitable for digitising a signal having a wide bandwidth comprises a filter bank (30) for dividing a received signal into a plurality of frequency sub-bands, means (41-45) for digitising each sub-band using a low sample rate, means (51) for transforming each digitised sub-band signals into the frequency domain, means (61-65, 70) for concatenating the frequency domain sub-band signals to reconstruct the spectrum of the received signal. For a signal that occupies only one sub-band at any one instant, for example a frequency hopping signal or a chirp signal, a single analogue-to-digital converter may be used to digitise each sub-band in turn, and the transformation into the frequency domain may be performed for each sub-band in turn.
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