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Butterfly Circuit Simple Theory
Original Post: Butterfly circuit in Baseband (eGroups Msg.)
Date: 2000-07-13
Examining the Butterfly implementation with multiplexer (referred to in
Baseband specs - Hop selection pg 132 ) often seems quite difficult.
Though it does explain it in some details, it can get a little
overpowering.
But it is important to remember it all comes down to a Fairly simple
permutation...
- When the control bit is set to 1, you cross the lines.
- When it is set to 0, you do not cross the lines
Table 11.1 and 11.2 give the lines that are controlled by each bit of
P.
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