Begin with the data path
Define channel count, incoming throughput, operations per sample and output deadline before choosing a board. Equal sampling rates do not imply equal memory or processing requirements.
Parallelism with a purpose
FPGA DSP blocks provide dedicated arithmetic resources. A pipeline can keep different stages working on different samples. Actual latency still depends on clocks, implementation and transfers.
A practical shortlist
- Input and output bandwidth, including margin
- Memory, buffering and channel synchronization
- Logic and DSP utilization after a prototype build
- Development tools and hardware test access
Prototype a representative processing chain and measure its throughput before committing to a platform.