Can I do right now... no but probably could figure it out :). I don't have any specific recommendations for a dev board, though a selection of some cheap dev b

Can I do right now... no but probably could figure it out :). I don't have any specific recommendations for a dev board, though a selection of some cheap dev boards is here: https://www.joelw.id.au/FPGA/CheapFPGADevelopmentBoards https://www.joelw.id.au/FPGA/CheapFPGADevelopmentBoards If you search around on Alibaba you can find some cheap dev boards that appear to have ethernet already (instead of you having to provide an ethernet PHY, which I think takes up something like 18 IOs?). Beware that even though most dev boards have a USB interface for programming it probably doesn't function as a USB for comms (i.e. you'd probably need to provide another USB PHY). Each I2S device probably requires 3 GPIOs. Someone who knows a lot more about this can probably make a much better recommendation. If you do the beamforming on the FPGA then you probably only need to output a lot less data that might be easily done over a simple UART. In the end, designing your own board with the right-size FPGA is probably the right solution, but that's only cheap per-unit in quantity and requires someone who more than sort of knows what they're doing. Though for someone who knows what they're doing it'd be a relatively quick project...