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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 8: DIGITAL MODULATION TECHNIQUES"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.10: probability_of_error.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: probability of error\n",
+"//Example 8.10\n",
+"//page no 382\n",
+"//Find probability of error of FSK\n",
+"clc;\n",
+"clear;\n",
+"rb=300;//bit rate\n",
+"T=1/rb;\n",
+"A2N0=8000;\n",
+"//Pe=1/2*exp(-Eb/2N0);\n",
+"//Eb=A^2*T/2\n",
+"Pe=1/2*exp(-((A2N0*T)/4));//Probability of error non coherent FSK\n",
+"disp(Pe,'Probability of error is ');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.11: probability_of_symbol_error.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: probability of symbol error\n",
+"//Example 8.11\n",
+"//page no 383\n",
+"//Find probability of symbol error \n",
+"//assuming coherent detection\n",
+"clc;\n",
+"clear;\n",
+"rb=2.5*10^6//binary data rate\n",
+"N0=2*10^-20;//power spectral density of noise FSK system\n",
+"A=1*10^-6;//amplitude of received signal\n",
+"T=1/rb;\n",
+"Eb=(A^2*T)/2;// Eb=bit energy\n",
+"z=sqrt(Eb/(2*N0))\n",
+"Pe=1/2*erfc(z);//probability of symbol error\n",
+"disp(Pe,'probability of symbol error');//"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.1: probability_of_error.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"//Caption: probability of  error\n",
+"//Example 8.1\n",
+"//page no 374\n",
+"//Find probability of bit error \n",
+"//AWGN is added to signal\n",
+"clc;\n",
+"clear;\n",
+"N0=2*10^-15;\n",
+"Ps1=1/2;\n",
+"Ps2=1/2;\n",
+"A=0.2*10^-3;\n",
+"T=2*10^-6;\n",
+"\n",
+"Eb=(A/sqrt(2))^2*T*Ps1+Ps2*0^2;//Eb=bit energy\n",
+"z=sqrt(Eb/N0);//Probability \n",
+"disp(z,'z = ');\n",
+"//Pe=(8)*10^(-4)//probability of  error from the table\n",
+"Pe=1/2*erfc(z/sqrt(2));\n",
+"disp('probability of bit error when P(s1)=P(s2)=1/2 ');\n",
+"disp(Pe,'P(e)=');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.2: peak_Amplitude.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: peak Amplitude\n",
+"//Example 8.2\n",
+"//page no 374\n",
+"//Find peak Transmission pulseAmplitude\n",
+"clc;\n",
+"clear;\n",
+"NO=1.338*10^-5;\n",
+"Pe=2.055*10^-5;\n",
+"T=100*10^-6;\n",
+"//Pe=erfc(sqrt(Eb/(2*N0)));\n",
+"Eb=(2*2.9^2*NO);\n",
+"A=sqrt((Eb*2)/T);\n",
+"disp('Volts',A,'Transmission pulse Amplitude');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.4: probability_of_error.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: probability of error\n",
+"//Example 8.4\n",
+"//page no 377\n",
+"//Find probability of error\n",
+"clc;\n",
+"clear;\n",
+"A=1*10^-3;\n",
+"Tb=0.2*10^-3;\n",
+"fb=1/Tb;\n",
+"fc=5*fb;\n",
+"N0=2*10^-11;// power sepctral density\n",
+"\n",
+"Eb=(A^2*Tb)/2;//Eb=bit energy\n",
+"\n",
+"\n",
+"z=sqrt(Eb/N0);\n",
+"Pe=erfc(z)'//bit error probability\n",
+"disp('Error probability of PSK is ')\n",
+"disp(Pe,'P(e) =');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.5: probability_bit_error.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: probability bit error\n",
+"//Example 8.5\n",
+"//page no 378\n",
+"//Find bit error probability \n",
+"clc;\n",
+"clear;\n",
+"A=10*10^-3;\n",
+"T=10^-6;\n",
+"N0=10^-11;// power sepctral density\n",
+"\n",
+"Eb=(A^2*T)/2//Eb=bit energy\n",
+"\n",
+"z=sqrt(Eb/N0);//Probability of ASK\n",
+"Pe=erfc(z)'//bit error probability\n",
+"disp('bit error probability ')\n",
+"disp(Pe,'Pe =')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.7: Amplitude.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: amplitude\n",
+"//Example 8.7\n",
+"//page no 379\n",
+"//Find carrier amplitude\n",
+"clc;\n",
+"clear;\n",
+"Pe=10^-4;//probability of error of PSK\n",
+"N0=2*10^-10;\n",
+"//from table error function \n",
+"//Pe=erffc(z)\n",
+"z=2.6\n",
+"r=10^6;\n",
+"T=1/r;\n",
+" //z=sqrt(Eb/N0)\n",
+"Eb=N0*z^2;      // Eb=bit energy\n",
+"A=sqrt((Eb*2)/T); //Eb=A^2*T/2\n",
+"disp('mV',A*1000,'Carrier Amplitude');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 8.8: Carrier_power_and_Bandwidth.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"\n",
+"//Caption: Carrier power\n",
+"//Example 8.8\n",
+"//page no 382\n",
+"//Find Carrier power,Bandwidth\n",
+"clc;\n",
+"clear;\n",
+"Pe=10^-4;//probability of error of FSK\n",
+"r=1*10^6//tranasmitted rate\n",
+"N0=1*10^-7;//psd at input of the receiver\n",
+"//from table error function \n",
+"//Pe=erffc(z)\n",
+"z=3.71\n",
+"T=1/r;\n",
+" //z=sqrt(Eb/N0)\n",
+"//Eb=N0*z^2;      // Eb=bit energy\n",
+"Ac=sqrt((z^2*2*N0)/T);\n",
+"\n",
+"AP=(Ac/sqrt(2))^2;//average carrier power\n",
+"disp('watts',AP,'Average carrier power  =');\n",
+"BW=1/T;\n",
+"disp('MHz',BW*10^-6,'Channel Bandwidth  =');"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}