Signal Processing Toolbox 6.12
Measuring the Power of Deterministic Periodic Signals
Richard says:'This page is an interesting and important in understanding the concept of power measurement / estimation of discrete time signals in the frequency domain.'
This demonstration will focus on power signals, specifically deterministic periodic signals. Although continuous in time, periodic deterministic signals produce discrete power spectrums. For this reason we will use mean-square (power) to measure the signal's power at a specific frequency.
We will provide two examples of how to measure a signal's average power. The examples will use sine waves and assume a load impedance of 1 Ohm.
http://www.mathworks.com/products/signal/demos.html?file=/products/demos/shipping/signal/deterministicsignalpower.html
Essentially use 'msspectrum' to measure power at each frequency and use 'PSD' to measure power the average power in a frequency band as a fraction of the average power in the signal sample over the whole frequency range. Discuss this further.
ReplyDelete