The Designing Digital Down Conversion Systems design example, featuring the Altera® CIC and FIR MegaCore® functions, demonstrates a multichannel, multirate digital system using Altera's DSP MegaCore intellectual property (IP).
Sample rate conversion has a wide range of applications in modern digital systems, especially wireless communications systems such as WCDMA and WiMAX systems. Efficient implementation of decimation and interpolation can be accomplished by concatenating cascaded-integrator-comb (CIC) and finite impulse response (FIR) filters.
This example demonstrates a data rate down conversion system that can be commonly seen in time division multiplexing (TDM) WiMAX receivers. The overall system diagram is shown in Figure 1.