Custom code for use with basic RX RF front-end. As the A/Ds used
in the N210 have an analogue BW of ~200MHz we use sub-Nyquist
sampling to downconvert to an IF of 5 MHz. Along with an external
anti-alias filter and LNA on the RX chain, this should give a far
superior NF to what is possible with the Ettus DDC RF cards.
Played around getting the Verilog macro definitions to play nicely.