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R2012a Documentation → Communications System Toolbox
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Contents

Index

• Getting Started

Required Products

Expected Background

Configure the Simulink Environment for Communications Models

Demos in the Help Browser

Demos on the Web

Demos on MATLAB Central

Section Overview

Opening the Model

Overview of the Model

Quadrature Amplitude Modulation

Run a Simulation

Display the Error Rate

Set Block Parameters

Display a Phase Noise Plot

Section Overview

Modulate a Random Signal

Plot Signal Constellations

Pulse Shaping Using a Raised Cosine Filter

Use a Convolutional Code

Create a System Object

Define a New System Object

Change a System Object Property

Run a System Object

Display Available System Objects

Create a New System Object

Retrieve System Object Property Values

Set System Object Property Values

What are System Object Methods?

The Step Method

Advantages of Using Methods

Understand System Object Modes

Change Properties While Running System Objects

Change System Object Input Complexity or Dimensions

Considerations for Using System Objects in Generated Code

Use System Objects with codegen

Use System Objects with the MATLAB Function Block

Use System Objects with MATLAB Compiler

• User's Guide

• Signal Sources

• Performance Evaluation

• Source Coding

• Error-Control Coding

• Interleaving/Deinterleaving

• Analog Modulation/Demodulation

• Digital Modulation/Demodulation

• Pulse Shaping

• Galois Field

• Galois Fields of Odd Characteristic

MATLAB Utilities

• GUI

• Block Library Functions

• System Objects

• Release Notes

iscatastrophic - True for trellis corresponding to catastrophic convolutional code

Syntax

iscatastrophic(s)

Description

iscatastrophic(s) returns true if the trellis s corresponds to a convolutional code that causes catastrophic error propagation. Otherwise, it returns false.

See Also

convenc | istrellis | poly2trellis | struct

How To

Convolutional Codes

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