Hi Martin,
Thanks for your response --
Could you further clarify the following pieces of code in
rx_dsp_core_200.cpp regarding the scaling factor?
const double rate_pow = std::pow(double(decim & 0xff), 4);
_scaling_adjustment = std::pow(2, ceil_log2(rate_pow))/(1.65*rate_pow);
this->update_sca
Half-Bands are very flat in the passband, and somewhat efficient to
implement because every second tap is zero. The CIC on the other hand, is
super efficient, but has a horrible frequency response.
So, you want to use the half-bands for decimation whenever possible. You
will have fewer aliases, th
Dear all,
I have some questions regarding the DDC implementation (ddc_chain.v, usrp2):
1) Why do we need two half-band filters (one large and one small) after the
CIC? What is their purpose? Can’t we use just one half-band?
2) What is the purpose of the scale factor multiplication after hb2? Wha
