power delay profile plot of the wireless channel

I am trying to plot power delay profile using my measurements data from the instrument. I extracted the data of channel impulse response. For that, I used the formula, pdp= abs(x_h.^2./t) where x_h is the peak value of the signal voltage of the channel and t time at each point. Using this formula, I got the curve as below which is not logical. It should be the maximum peak value in the first time then lower value s for the later time. So far, I am using the following code

     clc
      clear all

      impulse_response = xlsread('C:\Users\muni\Downloads\Ch_Impulse_response.xlsx');
      size=length(impulse_response);
      dt = impulse_response(:,1);  % response time in second
      h = impulse_response(:,2);  %%peak value of the signal voltage of the channel ## unit in dBVpk ## from the channle quality measurement
      m=h./10;
      x_h = 10.^m
      t= dt* 10^9;  % time in ns
      pdp= abs(x_h.^2./t)
      pdp_dBm= 20*log10(pdp/10^-3); %%Received power in dBm

      %ReceivedPower_dB = 20*log10(PDP)

      figure
      plot(t,pdp_dBm)

      title('Power Delay Profle from measred data')
      xlabel('Time in ns')
      ylabel('Received Power [dBm/ns]')

How can I render the exact plot of Power Delay Profile of the channel?I think I need to add the delay time, but I am not sure from where I can find it because I got the impulse response data points of the channel from the instrument.

[Ghaith Al-Juboori]

Hi, try to use the following code:

% PLOT RAYS:

 figure

 h=stem(rays(:,3)*10^9, (20*log10(abs(rays(:,1)))+30), '.');
 set(h,'BaseValue',-180);
 xlabel('Delay (ns)')
 ylabel('Ray power (dBm)')
 grid on

[Yugandhara Rao]

is there any block diagram to imlpementation

[Akinyele Itamakinde]

I have the same issue to solve. Pls, i need more input to this question to solve my problem too. Pls @Mahfuza Khatun, kindly help if you have found solution to the question.

Thanks