Electronic Countermeasures (ECM) - MATLAB Simulations for Radar Systems Design - page 476

P t G 2 R 2 σ B J P PC
4π ERP

S
---

= ----------------------------------------------

(10.14)

) G ′ R 4 B r L (

Again, the cross-over range is that corresponding to SJ = ; it is given by

 14

⁄

P t G 2 R 2 σ B J P PC
4π ERP



---------------------------------------

( R CO ) SOJ =  

(10.15)

( ) G ′ B r L

 

MATLAB Program Ðsoj_req.mÑ

The program Ðsoj_req.mÑ implements Eqs. (10.15); it is given in Listing
10.4 in Section 10.5. The inputs to the program Ðsoj_req.mÑ are the same as in
the SSJ case, with two additional inputs: the radar antenna gain on the jammer
and radar-to-jammer range . This program generates the same types of
plots as in the case of the SSJ. Typical output is in Fig. 10.4 utilizing the same
parameters as those in the SSJ case, with jammer peak power ,
jammer antenna gain , radar antenna gain on the jammer
, and radar to jammer range

G ′ R J

P J = 5000 W

G J = 30 dB

G ′ = 10 dB R J = 22.2 Km .

Figure 10.4. Target and jammer echo signals. Plots were generated using
the program Ðsoj_req.mÑ .