[makomk]

I think even these days, a lot of what the author is doing here is still generally done in hardware for power efficiency reasons - it's just that nowadays, the hardware looks a lot like the software-defined architecture used here with a conversion to digital at the frontend followed by hardware accelerators for doing cross-correlation in the fourier domain. Actually, this kind of approach of implementing the architecture an SDR-based receiver would use as specialised hardware seems to be pretty common in general nowadays.