Tapped Delay

The Tapped Delay block delays the input signal by the specified number of sample periods and provides an output for each delay. For example, if you specify 4 for the Number of delays parameter and Oldest for the Order output vector starting with, the block provides four outputs - the first delayed by four sample periods, the second delayed by three, and so on. Use this block to sample a signal in time or resample a signal at a different rate.

The block takes a single signal (scalar, vector, or matrix) as input and generates an output vector containing the data for each incremental delay. Specify the order of the delayed signals in the output vector using the Order output vector starting with parameter as follows:

Set the output vector for the first sampling period using the Initial condition parameter. Careful selection of this parameter can mitigate undesirable output behaviour.

Specify the time between samples using the Sample time parameter. Specify the number of delays using the Number of delays parameter. Each delay is equivalent to a discrete time operator , which represents a block Unit Delay.

If the Number of delays parameter is -1, the output singal inherits the dimensionality of the input signal. In this case vectorisation becomes available. But the Initial condition dimension (IC) must not change the dimension of the output signal. That is, for example, if the input is a 2x2 matrix and IC is a vector of length 2, then the output dimension is equal to the input dimension - 2 by 2, and the IC value extends to the corresponding dimension. But if the input is a vector of length 2 and the IC is a 2 by 2 matrix, the block will generate an error because this configuration will require a 2 by 2 output signal, which will change the dimensionality of the input signal.