Baseband signal processing technique
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United States of America Patent
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Apr 23, 2013
Grant Date -
Jan 20, 2011
app pub date -
Mar 17, 2009
filing date -
Mar 26, 2008
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Abstract
A baseband processing technique is described that permits to process in an analog signal domain a complex-valued baseband signal to laterally remove interference components resulting, for example, from in-band blocking signals. In an exemplary device implementation, the baseband processing device is configured to receive a baseband signal having a designated signal bandwidth defined by two opposite band edges, wherein a first frequency shift in a first direction toward a first band edge is impressed on the baseband signal. The device comprises a first filter stage adapted to filter the baseband signal exhibiting the first frequency shift to remove interference components behind the first band edge, a frequency shifter stage adapted to shift the filtered baseband signal by a second frequency shift in a second direction opposite the first direction towards a second band edge, and a second filter stage adapted to filter the baseband signal exhibiting the second frequency shift to remove interference components behind the second band edge.
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