Tapped Delay

Block Tapped Delay delays the input signal for the specified number of sampling periods and provides an output signal for each delay. For example, if you specify 4 for the parameters Number of delays и Oldest for 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 over time, or to 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 parameters Order output vector starting with as follows:

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

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

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