Communications Blockset

Communications Sources

Every communication system contains one or more sources. You can open the Comm Sources library by double-clicking its icon in the main Communications Blockset library (commlib), or by typing commsource2 at the MATLAB prompt.

Note    In this document, you can jump to a block's reference page by clicking on its icon below.

The Comms Sources library contains four sublibraries:

• Controlled Sources, which contains blocks that simulate nonrandom signals by reading from a file or by simulating a voltage-controlled oscillator (VCO).
• Data Sources, which contains blocks that generate random data to simulate signal sources.
• Noise Generators, which contains blocks that generate random data to simulate channel noise.
• Sequence Generators, which contains blocks that generate sequences for spreading or synchronization in a communication system.

Controlled Sources

You can open the Controlled Sources sublibrary by double-clicking on its icon in the Comm Sources library (commsource2), or by typing commcontsrc2 at the MATLAB prompt.

The table below lists and describes the blocks in the Controlled Sources library. For information about a specific block, see the reference pages that follow.

Block Name	Purpose
Discrete-Time VCO	Implement a voltage-controlled oscillator in discrete time
Triggered Read From File	Read from a file, refreshing the output at rising edges of an input signal
Voltage-Controlled Oscillator	Implement a voltage-controlled oscillator

Data Sources

You can open the Data Sources sublibrary by double-clicking on its icon in the Comm Sources library (commsource2), or by typing commrandsrc2 at the MATLAB prompt.

The table below lists and describes the blocks in the Data Sources sublibrary. For information about a specific block, see the reference pages that follow.

Block Name	Purpose
Bernoulli Binary Generator	Generate Bernoulli-distributed random binary numbers
Binary Error Pattern Generator	Generate a binary vector while controlling the number of 1s
Poisson Integer Generator	Generate Poisson-distributed random integers
Random Integer Generator	Generate integers randomly distributed in the range [0, M-1]

Noise Generators

You can open the Noise Generators sublibrary by double-clicking on its icon in the Comm Sources library (commsource2), or by typing commnoisgen2 at the MATLAB prompt.

The table below lists and describes the blocks in the Noise Generators sublibrary. For information about a specific block, see the reference pages that follow.

Block Name	Purpose
Gaussian Noise Generator	Generate Gaussian distributed noise with given mean and variance values
Rayleigh Noise Generator	Generate Rayleigh distributed noise
Rician Noise Generator	Generate Rician distributed noise
Uniform Noise Generator	Generate uniformly distributed noise between the upper and lower bounds

Sequence Generators

You can open the Sequence Generators sublibrary by double-clicking on its icon in Comm Sources library (commsource2), or by typing commseqgen2 at the MATLAB prompt.

The table below lists and describes the blocks in the Sequence Generators sublibrary. For information about a specific block, see the reference pages that follow.

Block Name	Purpose
Barker Code Generator	Generate a Barker Code
Gold Sequence Generator	Generate a Gold sequence from a set of sequences
Kasami Sequence Generator	Generate a Kasami sequence from the set of Kasami sequences
Hadamard Code Generator	Generate a Hadamard code from an orthogonal set of codes
OVSF Code Generator	Generate an orthogonal variable spreading factor (OVSF) code from a set of orthogonal codes
PN Sequence Generator	Generate a pseudonoise sequence
Walsh Code Generator	Generate a Walsh code from an orthogonal set of codes

Block Reference

Communications Sinks