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Diffstat (limited to '1997/CH11/EX11.65/example65.sce')
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1 files changed, 36 insertions, 0 deletions
diff --git a/1997/CH11/EX11.65/example65.sce b/1997/CH11/EX11.65/example65.sce new file mode 100755 index 000000000..fe650cf3b --- /dev/null +++ b/1997/CH11/EX11.65/example65.sce @@ -0,0 +1,36 @@ +//Chapter-11 example 63
+//==========================================================================
+clc;
+clear;
+//Given data
+G = 50; // antenna gain in dB
+f = 6*10^9; // operating frequency
+Te = 1000; // Noise temp in kelvin
+SNR = 20; // min SNR in dB
+L = 10; // Losses in dB
+F = 3; // Noise Figure in dB
+RCS = -10; // Radar cross section in dB
+K = 1.38*10^-23; // boltzman constant
+Vo = 3*10^8; //vel of Em wave in m/s;
+DC = 0.3; // Duty cycle
+R = 300*10^3; // Range in kms
+Pav = 1000; // Average power in watts
+SV = 20; //search volume
+Ts = 3; //Scan time
+
+//calculations
+
+Pav1 = 10*log10(Pav) //conversion to dB
+KT = 10*log10(Te*K) //conversion to dB
+R4 = 10*log10(R^4) //conversion to dB
+Ts1 = 10*log10(Ts) //conversion to dB
+//SNR = (Pav*A*RCS*Ts)/(16*R^4*K*Te*L*F*SV)
+A = (SNR-Pav1-Ts-RCS+16+R4+KT+L+F+SV);//aperture
+Pt = Pav/DC; // peak ower in watts
+//A1 =10^(A/10); // antilog calculation
+
+//output
+mprintf('A = %3.2f dB\n Peak power Pt = %3.2f KW\n',A,Pt/1000);
+//mprintf('A = %3.2f m^2\n',A1)
+mprintf(' Note: calculation error in textbook at KT')
+//=============================================================================
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