Getting Started

Setting Parameters in the Channel Noise Model

To set block parameters in the channel noise model, do the following:

1. Double-click the Binary Symmetric Channel block and make the following changes to the default parameters in the block's mask:
• Set Error probability to 0.01.
• Clear the box next to Output error vector. This removes the block's lower output port, which is not needed for this model.

  

2. Double-click the Error Rate Calculation block and make the following changes to the default parameters in the block's mask:
• Set Output data to Port to create an output port for the block.
• Select the box next to Stop simulation.

  

Selecting the box next to Stop simulation causes the simulation to stop after the target number of errors occurs or the maximum number of symbols is reached.

Initial Seeds

The Bernoulli Binary Generator block and the Binary Symmetric Channel block both use a random number generator to generate random sequences of bits. In both blocks, the Initial seed parameter initializes the random sequence. The initial seeds in the two blocks should have different values to ensure that the source signal and the channel noise are statistically independent. In general, initial seeds should have a different values in all blocks that have an Initial seed parameter.

Selecting Blocks for the Channel Noise Model

Connecting the Blocks