Random Stream and mt19937ar with seed

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

Answer 1

[Sebastian Castro]

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

Answer 2

[Daylon Hester]

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.