Coherent detection: Difference between revisions
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<div class="definition"><div class="short_definition">The conversion of the [[intermediate frequency (IF) signal]] in a [[Doppler radar]] or [[lidar]] to [[I and Q channels]] so that the [[phase]] of the [[echoes]] is preserved.</div><br/> <div class="paragraph">Typically two mixers, fed by IF reference signals in phase [[quadrature]], are used to convert the [[frequency]] components in the IF signal, centered at the IF frequency, to two [[video]] signals with frequency components centered at zero frequency, without modifying the information content.</div><br/> </div> | <div class="definition"><div class="short_definition">The conversion of the [[IF signal|intermediate frequency (IF) signal]] in a [[Doppler radar]] or [[lidar]] to [[I and Q channels]] so that the [[phase]] of the [[echoes]] is preserved.</div><br/> <div class="paragraph">Typically two mixers, fed by IF reference signals in phase [[quadrature]], are used to convert the [[frequency]] components in the IF signal, centered at the IF frequency, to two [[video]] signals with frequency components centered at zero frequency, without modifying the information content.</div><br/> </div> | ||
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Latest revision as of 15:39, 25 April 2012
coherent detection
The conversion of the intermediate frequency (IF) signal in a Doppler radar or lidar to I and Q channels so that the phase of the echoes is preserved.
Typically two mixers, fed by IF reference signals in phase quadrature, are used to convert the frequency components in the IF signal, centered at the IF frequency, to two video signals with frequency components centered at zero frequency, without modifying the information content.
