Generate white Gaussian noise
y = wgn(m,n,p)
y = wgn(m,n,p,imp)
y = wgn(m,n,p,imp,state)
y = wgn(...,powertype
)
y = wgn(...,outputtype
)
y = wgn(m,n,p)
generates an m
-by-n
matrix
of white Gaussian noise. p
specifies the power
of y
in decibels relative to a watt. The default
load impedance is 1 ohm.
y = wgn(m,n,p,imp)
is
the same as the previous syntax, except that imp
specifies
the load impedance in ohms.
y = wgn(m,n,p,imp,s) uses s, which is a random
stream handle, to generate random noise samples with randn. This syntax
is useful to generate repeatable outputs. Type help RandStream
for
more information.
y = wgn(m,n,p,imp,state)
is
the same as the previous syntax, except that wgn
first
resets the state of the normal random number generator randn
to the integer state
.
Note:
This usage is deprecated and may be removed in a future release.
Instead of |
y = wgn(...,
is
the same as the previous syntaxes, except that the string powertype
)powertype
specifies
the units of p
. Choices for powertype
are 'dBW'
, 'dBm'
,
and 'linear'
.
y = wgn(...,
is
the same as the previous syntaxes, except that the string outputtype
)outputtype
specifies
whether the noise is real or complex. Choices for outputtype
are 'real'
and 'complex'
.
If outputtype
is 'complex'
,
then the real and imaginary parts of y
each have
a noise power of p
/2.
Note:
The unit of measure for the output of the |