Generate Poisson-distributed random integers
Random Data Sources sublibrary of Comm Sources
The Poisson Integer Generator block generates random integers using a Poisson distribution. The probability of generating a nonnegative integer k is
where λ is a positive number known as the Poisson parameter.
You can use the Poisson Integer Generator to generate noise in a binary transmission channel. In this case, the Poisson parameter Lambda should be less than 1, usually much less.
The output signal can be a column or row vector, a two-dimensional matrix, or a scalar. The number of rows in the output signal corresponds to the number of samples in one frame and is determined by the Samples per frame parameter. The number of columns in the output signal corresponds to the number of channels and is determined by the number of elements in the Lambda parameter. See Sources and Sinks in Communications System Toolbox™ User's Guide for more details.
The Poisson parameter λ. Specify λ as a scalar or row vector whose elements are real numbers. If Lambda is a scalar, then every element in the output vector shares the same Poisson parameter. If Lambda is a row vector, then the number of elements correspond to the number of independent channels output from the block.
The source of the initial seed for the random number generator.
Specify the source as either
When set to
Auto, the block uses the global
random number stream.
When Source of initial seed is
generation mode, the random number generator uses an
initial seed of zero. Therefore, the block generates the same random
numbers each time it is started. Use
Interpreted execution to
ensure that the model uses different initial seeds. If
execution is run in
Rapid accelerator mode,
then it behaves the same as
Code generation mode.
The initial seed value for the random number generator. Specify
the seed as a nonnegative integer scalar. Initial seed is
available when the Source of initial seed parameter
is set to
The time between each sample of a column of the output signal.
The number of samples per frame in one channel of the output signal. Specify Samples per frame as a positive integer scalar.
The time between output updates is equal to the product of Samples per frame and Sample time. For example, if Sample time and Samples per frame equal one, the block outputs an integer every second. If Samples per frame is increased to 10, then a 10-by-1 vector is output every 10 seconds. This ensures that the equivalent output rate is not dependent on the Samples per frame parameter.
The output type of the block can be specified as a
double. The default is
Single outputs may lead to different results when compared with double
outputs for the same set of parameters.
Select the simulation mode.
On the first model run, simulate and generate code. If the structure of the block does not change, subsequent model runs do not regenerate the code.
If the simulation mode is
System objects corresponding to the blocks accept a maximum of nine
Simulate model without generating code. This option results in faster start times but can slow subsequent simulation performance.