From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

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 3542/CH6/EX6.5/Ex6_5.sce | 30 ++++++++++++++++++++++++++++++
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+// Example no 6.5
+// To determine the analog bandwidth, output SNR improvement if modulation index is increased from 3 to 5 and tradeoff bandwidth for this improvement.
+// Page no. 277
+
+clc;
+clear all;
+
+// Given data
+fm=5*10^3;                                        // Audio bandwidth of FM signal
+betaf1=3;                                         // Initial modulation index
+betaf2=5;                                         // Final modulation index
+
+// To determine analog bandwidth
+BT1=2*(betaf1+1)*fm;                               // The analog bandwidth
+BT2=2*(betaf2+1)*fm;                               // The analog bandwidth
+
+// To determine output SNR improvement factor
+SNR1=3*betaf1^3+3*betaf1^2;                      // Output SNR factor for modulation index=3
+SNR1=10*log10(SNR1);                             // Output SNR factor for modulation index=3 in dB
+SNR2=3*betaf2^3+3*betaf2^2;                       // Output SNR factor for modulation index=3
+SNR2=10*log10(SNR2);                             // Output SNR factor for modulation index=3 in dB
+
+// To determine improvement in output SNR by increasing modulation index
+improvedSNR=SNR2-SNR1;                           // Improvement in output SNR by increasing modulation index
+
+// Displaying the result in command window
+printf('\n Using Carson rule, the analog bandwidth at 3 modulation index occupied by FM signal = %0.0f KHz',BT1*10^-3);
+printf('\n Using Carson rule, the analog bandwidth at 5 modulation index occupied by FM signal = %0.0f KHz',BT2*10^-3);
+printf('\n Improvement in output SNR by increasing modulation index = %0.1f dB',improvedSNR);
+printf('\n \n This improvement is achieved at the expenses of bandwidth. For modulation index = 3, a bandwidth of 40kHz is needed,\n while for modulation index = 5 requires bandwidth = 60kHz.');
-- 
cgit