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Area Reduction
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Reduce one or both stages of dec/interp to max rate of 8 instead of 16
Optimize CICs to minimize registers
Reduce width of RX CORDIC
Fix CORDIC wasted logic cells from bad synthesis
Progressively narrow x,y,z on CORDIC
16-bit wide FIFOs, split IQ/channels on other side (?)
Enhancements
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Halfband filter in Spartan 3
Muxing of inputs
Switch over to newfc
RAM interface?
Other
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Capture/Transmit straight samples (no DUC/DDC)
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