1. Your Name Your Title Your Organization (Line #1) Your Organization (Line #2) Week 7 Update Joe Hoatam Josh Merritt Aaron Nielsen

2. Outline Radar Terminology Windowing Matlab Simulation Mean Velocity Mean Power Standard Deviations

3. Commonly Used Windows Rectangular Bartlett Hanning Hamming Blackman

4. Commonly Used Windows Type of Window Peak Side Lobe Amplitude (Relative) Approximate Width of Main Lobe Peak Approximation Error (dB) Rectangular-13-21 Bartlett-25 Hanning-31-44 Hamming-41-53 Blackman-57-74

5. Commonly Used Windows

6. Radar terminology SNR (signal to noise ratio)- ratio of a given transmitted signal to the background noise of the transmission medium Nyquist Frequency- it is the frequency just larger than the signal bandwidth is sufficient to allow perfect reconstruction of the signal from the samples. Unambiguity Radial Velocity- It is the maxium velocity detectable without ambiguity Unambiguity Range – the maximum range detectable without ambiguity ZDR- a method to refine rain fall measurements, able to detect hail Sprectrum Width- measurement of velocity distribution in an object

7. Matlab Simulation Code for i=[16,32,64,128,256]; for j=1:25 [h_ts,v_ts]=simSIG(…); [h_temp,h_lag]=xcorr(h_ts,1); psd_temp(j,temp)=h_temp(2)/i; vel_temp(j,temp)=phase(h_temp(3)); end temp=temp+1; end vel_temp=abs(vel_temp * lambda/(4*pi*prt)); psd_ts=mean(dbs(psd_temp)); vel_ts=mean(vel_temp); std_p=std(dbs(psd_temp)); std_v=std(vel_temp);

8. Matlab Simulation