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Unformatted text preview: at the IF. One of the interference
frequencies that results from this mechanism will be separated from the desired carrier frequency by 1/2 of
the IF, hence the name “1/2-IF”. The other interference frequency will be farther from the carrier frequency,
and hence easier to remove with the pre-selector ﬁlter.
d. |2fLO − 2fi | = fIF → 2fLO − 2fi = ±fIF → fi = fLO ∓ fIF /2. Since the receiver uses high LO, the desired
carrier frequency is fc = fLO − fIF , so the frequencies of the interferers become fi = (fc + fIF...
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This homework help was uploaded on 03/13/2014 for the course ECE 453 taught by Professor Staff during the Spring '08 term at University of Illinois, Urbana Champaign.
- Spring '08