peak2rms
Peak-magnitude-to-RMS ratio
Description
Examples
Peak-Magnitude-to-RMS Ratio of Sinusoid
Compute the peak-magnitude-to-RMS ratio of a 100 Hz sinusoid sampled at 1 kHz.
t = 0:0.001:1-0.001; x = cos(2*pi*100*t); y = peak2rms(x)
y = 1.4142
Peak-Magnitude-to-RMS Ratio of Complex Exponential
Create a complex exponential with a frequency of rad/sample. Find the peak-magnitude-to-RMS ratio.
n = 0:99; x = exp(1j*pi/4*n); y = peak2rms(x)
y = 1
Peak-Magnitude-to-RMS Ratios of 2-D Matrix
Create a matrix in which each column is a 100 Hz sinusoid sampled at 1 kHz with a different amplitude. The amplitude is equal to the column index.
Compute the peak-magnitude-to-RMS ratios of the columns.
t = 0:0.001:1-0.001; x = cos(2*pi*100*t)'*(1:4); y = peak2rms(x)
y = 1×4
1.4142 1.4142 1.4142 1.4142
Peak-Magnitude-to-RMS Ratios of 2-D Matrix Along Specified Dimension
Create a matrix in which each row is a 100 Hz sinusoid sampled at 1 kHz with a different amplitude. The amplitude is equal to the row index.
Compute the RMS levels of the rows, specifying the dimension equal to 2 with the dim
argument.
t = 0:0.001:1-0.001; x = (1:4)'*cos(2*pi*100*t); y = peak2rms(x,2)
y = 4×1
1.4142
1.4142
1.4142
1.4142
Input Arguments
x
— Input array
vector | matrix | N-D array
Input signal, specified as a vector, matrix, or N-D array.
Data Types: double
| single
Complex Number Support: Yes
dim
— Dimension to operate along
positive integer scalar
Dimension to operate along, specified as a positive integer scalar. By default,
peak2rms
operates along the first array dimension of
x
with size greater than 1. For example, if
x
is a row or column vector, y
is a
real-valued scalar. If x
is an
N-by-M matrix with N > 1,
y
is a 1-by-M row vector containing the
peak-magnitude-to-RMS levels of the columns of y
.
Data Types: double
| single
Output Arguments
y
— Peak-magnitude-to-RMS ratio
scalar | matrix | N-D array
Peak-magnitude-to-RMS ratio, specified as a real-valued scalar, matrix, or N-D array.
More About
Peak-Magnitude-to-RMS Ratio
The peak-magnitude-to-RMS ratio is
where the infinity-norm and RMS values are computed along the specified dimension.
References
[1] IEEE® Standard on Transitions, Pulses, and Related Waveforms, IEEE Standard 181, 2003.
Extended Capabilities
Tall Arrays
Calculate with arrays that have more rows than fit in memory.
The
peak2rms
function fully supports tall arrays. For more information,
see Tall Arrays.
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Thread-Based Environment
Run code in the background using MATLAB® backgroundPool
or accelerate code with Parallel Computing Toolbox™ ThreadPool
.
This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.
GPU Arrays
Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™.
This function fully supports GPU arrays. For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).
Version History
Introduced in R2012a
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