Tunable Digital Filter for the ALMA Correlator - RadioNet
Tunable Digital Filter for the ALMA Correlator - RadioNet
Tunable Digital Filter for the ALMA Correlator - RadioNet
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<strong>Digital</strong> Backend Meeting MPIfR Bonn - Sep 6, 2004<strong>Tunable</strong> digital filter• Conceptually a SSB digital receiver• Complex LO and mixer• Low pass filter <strong>for</strong> band selection• Implementation using a 2-stage complex low-pass filter• 1 st stage: minimum selectivity required <strong>for</strong> correct decimation• 2 nd stage operates at 125 MHz, determines bandshape & final width
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