http://www.mathworks.com/matlabcentral/newsreader/view_thread/247525 Feed for thread: SNR after matched filter? en-us &copy;1994-2012 by MathWorks, Inc. webmaster@mathworks.com MATLAB Central Newsreader http://blogs.law.harvard.edu/tech/rss 60 http://www.mathworks.com/images/membrane_icon.gif Wed, 25 Mar 2009 21:20:04 -0400 http://www.mathworks.com/matlabcentral/newsreader/view_thread/247525#637749 bin Dear all,<br> <br> I have some questions about SNR after pulse compression.<br> <br> 1) since noise is a random process, while signal is not, does it mean the power calculation formula is different? Noise power is calculated using average power, while signal power is calculated using total power?<br> <br> noisePower = sum(noise.^2)/length(noise);<br> signalPower = sum(signal.^2);<br> <br> 2) If using matched filter to do pulse compression, how many dB in SNR increase theoretically?<br> <br> 3) Is matched filter just the time reversal of signal, or it need be be normalized? and how to normalized?<br> <br> Anyone can give me a simple example of SNR after matched filter compared to SNR before matched filter?<br> <br> Thank you very much!<br> <br> &nbsp;