Function sdr::downconverter::downconvert_fs_4

pub fn downconvert_fs_4(x: &Vec<u16>) -> Vec<IQ<i16>>

Downconvert by Fs/4

Takes an input stream of 12-bit u16 reals and outputs i16 IQ values, with Fs/4 downconverted to DC. Does not decimate or antialias, so the IQ sample rate equals the input sample rate, and you will likely want to antialias and then decimate by at least 2 afterwards.

Input block length must be a multiple of 4 for this process.