Floating-Point to Fixed-Point Conversion

Algorithm and model conversion

Topics

System Objects Supported by Fixed-Point Converter App

You can use the Fixed-Point Converter app to automatically propose and apply data types for commonly used system objects.

Convert dsp.FIRFilter Object to Fixed-Point Using the Fixed-Point Converter App

This example converts a dsp.FIRFilter System object™, which filters a high-frequency sinusoid signal, to fixed-point using the Fixed-Point Converter app.

Specify Fixed-Point Attributes for Blocks

Teaches you how to specify fixed-point attributes and parameters in software on both the block and system levels.

Convert Floating-Point Model to Fixed Point (Fixed-Point Designer)

Use the Fixed-Point Tool to convert a floating-point model to fixed point.

Convert to Fixed Point (Fixed-Point Designer)

Convert floating-point models to fixed point, optimize fixed-point data types based on simulation and derived data

Featured Examples

Floating-Point to Fixed-Point Conversion of IIR Filters

Floating-Point to Fixed-Point Conversion of IIR Filters

Use the Fixed-Point Converter App to convert an IIR filter from a floating-point to a fixed-point implementation. Second-order sections (also referred as biquadratic) structures work better when using fixed-point arithmetic than structures that implement the transfer function directly. We will show that the surest path to a successful "float-to-fixed" conversion consists of the following steps: Select a Second-Order Sections (SOS) structure, i.e. dsp.BiquadFilter

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Autoscaling and Curve Fitting

Autoscaling and Curve Fitting

The application envisioned for this example is automatic lane tracking on a road. We will show how to fit a polynomial to noisy data representing the lane boundary of the road ahead of a vehicle.

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