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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Concept of Flexible Transmitter<br />
BB<br />
path i=1<br />
Digital baseband<br />
phase shifters:<br />
0×2π/N<br />
path i=2<br />
1×2π/N<br />
Nonlinear<br />
circuit<br />
Nonlinear<br />
circuit<br />
Analog up-mixers<br />
with different phases<br />
LO<br />
LO<br />
0<br />
-2π/N<br />
y 1<br />
y 2<br />
y N<br />
-(N-1)×2π/N<br />
path i=N<br />
(N-1)×2π/N<br />
Nonlinear<br />
circuit<br />
LO<br />
[Shrestha et al, JSSC 2006]<br />
<strong>Cognitive</strong> <strong>Radio</strong> <strong>Challenges</strong>, Eric Klumperink<br />
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