User guide

52 www.xilinx.com System Generator for DSP Getting Started Guide
UG639 (v 14.3) October 16, 2012
Chapter 4: Getting Started
Up and Down Sampling Blocks
System Generator includes Up Sample and Down Sample blocks that change the system sample rate. The Up
Sample block adds additional samples to the signal to achieve the desired rate change. The value of these new
samples is either zero or the value of the last actual sample depending on the block options. The Down Sample
block simply discards samples until it achieves the desired rate change. For example, downsample by 3 means to
discard 2 out of every 3 samples.