Cognitive Radio Chip-Hardware Challenges - Hardware Conference
Cognitive Radio Chip-Hardware Challenges - Hardware Conference
Cognitive Radio Chip-Hardware Challenges - Hardware Conference
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Mixer multiplication frequency shift<br />
sin<br />
f<br />
t<br />
sinf<br />
t sinf<br />
f t sinf<br />
f <br />
LO<br />
in<br />
LO<br />
in<br />
LO<br />
in<br />
t<br />
<br />
Downconversion<br />
(receiver)<br />
Upconversion<br />
(transmitter)<br />
f IN<br />
Difference and Sum<br />
frequencies<br />
f LO<br />
Lowpass<br />
Filter<br />
f LO -f IN<br />
Down-conversion<br />
f IN<br />
f LO<br />
Up-conversion<br />
f LO +f IN<br />
Band<br />
Filter<br />
<strong>Cognitive</strong> <strong>Radio</strong> <strong>Challenges</strong>, Eric Klumperink<br />
16
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