Introduction to Radar Basics - MATLAB Simulations for Radar Systems Design - page 34

single pulse
94 pulse NCI
94 pulse CI

40

30

20

10

0

-10

1 2 3 4 5 6 7 8 9 10 11 12

Detection range - Km

Figure 1.20. SNR versus detection range, for the same example.

MATLAB Function Ðpulse_integration.mÑ

Figure 1.21 s hows the SNR gain versus the number of integrated pulses for
both coherent and non-coherent integration. This figure corresponds to param-
eters from the previous example at . Figure 1.22 shows the gen-
eral case SNR improvement versus number of integrated pulses. Both figures
were generated using MATLAB program Ðfig1_21.mÑ which is given in List-
ing 1.9 in Section 1.10. For this purpose the MATLAB function
Ðpulse_integration.mÑ was developed. It is given in Listing 1.10 in Section
1.10. This function calculates the radar equation given in Eq. (1.56) with pulse
integration. The syntax for MATLAB function Ðpulse_integration.mÑ is as fol-
lows

R = 5.01 Km

[snr] = pulse_integration (pt, freq, g, sigma, te, b, nf, loss, range, np, ci_nci)

where

Symbol Description Units Status

pt peak power Wa t t s input

freq radar center frequency Hz input

g antenna gain dB input

sigma target cross section input

m 2

te effective noise temperature Kelvin input

b bandwidth Hz input