Random Stream and mt19937ar with seed

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Hello,
The following object is built in by MATLAB
comm.AWGNChannel('NoiseMethod', 'Signal to noise ratio (SNR)',...
'SNR', snrdB, 'RandomStream', 'mt19937ar with seed', 'Seed', 67);
I am wondering what is the use of
'RandomStream', 'mt19937ar with seed', 'Seed', 67
I have seen this expression being used in many objects other than
comm.AWGNChannel.
Thanks

Accepted Answer

Sebastian Castro
Sebastian Castro on 27 Apr 2015
It's a way of generating random numbers. Look at the first example below: http://www.mathworks.com/help/matlab/ref/randstream.html
Also, to see some other types you can refer to this: http://www.mathworks.com/help/matlab/ref/randstream.list.html
- Sebastian

More Answers (1)

Daylon Hester
Daylon Hester on 11 Aug 2021
The argument following 'RandomStream' is the specific random number generator algorithm used. The default is called Mersenne Twister, but it is selected with 'mt19937ar'.
The seed number allows you to repeat the same number stream.

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