CCDF MATLAB Code for RF Engineers

The CCDF (Complementary Cumulative Distribution Function) curve is a valuable tool for RF engineers, especially when dealing with the Peak-to-Average Power Ratio (PAPR) of time-domain signals during RF Power Amplifier design.

For a foundational understanding of CCDF, please refer to the CCDF page in our terminology section.

Source Code

Another Way of Plotting CCDF

This method involves loading a time-domain data file. Here’s the MATLAB code:

load file_td_data;
rx_data = time_domain_data_vector;
rx1_data=abs(rx_data).^2;
ccdf_avg=mean(rx1_data);
ccdf_IA=sort(rx1_data,'descend');
ccdf_IAR=ccdf_IA./ccdf_avg;
figure;
plot(1:length(rx_data),10*log10(ccdf_IAR),'r.');
title('CCDF PLOT');
xlabel('time in sec');
ylabel('PAPR');

You’ll need to download the .mat file named file_td_data to load the time_domain_data_vector.

CCDF Curve Output

When you execute the MATLAB code and select 2 as the modulation type, you should obtain a CCDF curve similar to the one shown below.