Example of Crest Factor Reduction by peak windowing

Hello,

I would like to make a question about crest factor reduction by the peak windowing technique. During the last days I was trying to implement a simple script but I seem to be stuck into some confusing facts about the algorithm itself.

To better understand, I am referring to the technique contained inside the book "Behavioral Modeling and Linearization of RF Power Amplifiers" at page 4807. There a technique is described which allows to reduce the PAPR of a signal by windowing the signal and obtaining the scaling terms in order to reduce peaks, and get a trade off on the spectrale leakage by adjusting the window used for the scaling.

I think I got the main idea but I still have some troubles in developing this algorithm in MATLAB. I was wandering if somebody knows about a code source to have a look at to get an idea about the implementation. At least on basic level.

Greetings, Giovanni

Answer 1

[S.M.]

Hi there, First you should look at the signal in time domain. Plot it, the peaks are visible. If you divide the signal in portions and then write a code in a look for checking each sample with a threshold, you have detected the peaks, the next step is to reduce the peak. I can tell you more if you would. I wonder if you are doing it for paper or for company. Good luck.