Okay then. I wanna know of a better way to take four 1 GSPS signals, demodulate them, and pump out another two 1 GSPS signals which encode decisions made every every four samples on the incoming signals. That's ONE of the problems in quantum control for stabilizing one qubit. We did it with an FPGA. If you know of a DSP or systolic array or processor or what have you for doing this, I'm ALL ears. Oh and the timing must be COMPLETELY deterministic down to the nanosecond.

In fact, if you know of ANY general purpose hardware that will talk to gigasample ADCs/DACs, I'd love to know about it.