Polyphase

What is the threshold to prefer polyphase channelizer over FIR filtering?

What is the threshold to prefer polyphase channelizer over FIR filtering?
  1. What is polyphase FIR filter?
  2. Why polyphase filter is used?

What is polyphase FIR filter?

Polyphase is a way of doing sampling-rate conversion that leads to very efficient implementations. But more than that, it leads to very general viewpoints that are useful in building filter banks.

Why polyphase filter is used?

The polyphase FIR filter realization can provide advantages in computational efficiency when used for decimation or interpolation of discrete time signals.

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