Quantizer

Discretize input at given interval

• Library:

• Simulink / Discontinuities

Description

The Quantizer block discretizes the input signal using a quantization algorithm. The block uses a round-to-nearest method to map signal values to quantized values at the output that are defined by the Quantization interval. A smooth input signal can take on a stair-step shape after quantization.

This equation mathematically describes the round-to-nearest method:

y = q * round(u/q) 

where y is the quantized output, u is the input, and q is the Quantization interval.

Ports

Input

Port_1 — Input signal to quantize

scalar | vector

Input signal to the quantization algorithm.

Data Types: single | double
Complex Number Support: Yes

Output

Port_1 — Quantized output signal

scalar | vector

Output signal composed of discrete values, quantized with a round-to-nearest approach:

y = q * round(u/q) 

where y is the output, u is the input, and q is the Quantization interval.

Data Types: single | double

Parameters

Quantization interval — Interval that defines quantization levels for the output signal

0.5 (default) | scalar | vector

Specify the quantization interval used in the algorithm. Quantization levels for the Quantizer block output are integer multiples of the Quantization interval.

Programmatic Use

Block Parameter: QuantizationInterval

Type: character vector

Value: Any real or complex value

Default: '0.5'

Treat as gain when linearizing — Specify the gain value

On (default) | boolean

The linearization commands in Simulink^® software treat this block as a gain in state space. Select this check box to cause the commands to treat the gain as 1. Clear the box to have the commands treat the gain as 0.

Programmatic Use

Block Parameter: LinearizeAsGain

Type: character vector

Value: 'off' | 'on'

Default: 'on'

Sample time — Specify sample time as a value other than -1

-1 (default) | scalar | vector

Specify the sample time as a value other than -1. For more information, see Specify Sample Time.

Dependencies

This parameter is not visible unless it is explicitly set to a value other than -1. To learn more, see Blocks for Which Sample Time Is Not Recommended.

Programmatic Use

Block Parameter: SampleTime

Type: character vector

Values: scalar or vector

Default: '-1'

Model Examples

Using the Quantizer and Saturation blocks in sldemo_boiler

How the Quantizer and Saturation blocks are used in the model ex_sldemo_boiler.

Open Model

Block Characteristics

Data Types	double | single
Direct Feedthrough	yes
Multidimensional Signals	no
Variable-Size Signals	no
Zero-Crossing Detection	no

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.