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diff --git a/Analog_Communication_by_V_Chandrasekar/7-Introduction_to_Digital_Communication_.ipynb b/Analog_Communication_by_V_Chandrasekar/7-Introduction_to_Digital_Communication_.ipynb new file mode 100644 index 0000000..94546b6 --- /dev/null +++ b/Analog_Communication_by_V_Chandrasekar/7-Introduction_to_Digital_Communication_.ipynb @@ -0,0 +1,249 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 7: Introduction to Digital Communication " + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.1_A: Baud_Rate_and_Bandwidth.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"bin_signal=20; //binary signal in kbps\n", +"N=1;//since ASK\n", +"\n", +"Bw=bin_signal*10^(3);\n", +"Baud=bin_signal*10^(3);\n", +"\n", +"disp(Bw,'Bandwidth(in Hz)=');\n", +"disp(Baud,'Baud rate=');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.1: Baud_Rate.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"N=1;// since ASK\n", +"Bin_Sig=15;//Binary signal in kbps\n", +"\n", +"BW=Bin_Sig*10^(3)/N;\n", +"Baud=Bin_Sig*10^(3)/N;\n", +"disp(BW,'Bw=');\n", +"disp(Baud,'Baud=');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.2_A: Bandwidth_and_Baud_Rate.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mark_f=59;//MArk Frequency in Hz\n", +"space_f=61; //space frequency in Hz\n", +"input_rate=5;//input rate in kbps\n", +"\n", +"Peak_Frq_Dev=abs((mark_f-space_f)/2);\n", +"Bw=2*(Peak_Frq_Dev+input_rate)*10^(3);\n", +"baud=input_rate*10^(3);\n", +"\n", +"disp(Peak_Frq_Dev,'Peak Frequency Deviation (in KHz) =');\n", +"disp(Bw,'Minimum BW (in Hz)=');\n", +"disp(baud,'Baud=');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.2: Baud_Rate_and_Bandwidth.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mark_f=60;//Mark Frequency in KHz\n", +"space_f=63;//Space Frequency in KHz\n", +"input_bit_rate=3;// input bit rate\n", +"\n", +"Peak_Frq_Dev=abs((mark_f-space_f)/2);\n", +"B=2*(Peak_Frq_Dev+input_bit_rate);\n", +"Baud=input_bit_rate*10^(3);\n", +"\n", +"disp(Peak_Frq_Dev,'Peak Frequency Deviation(in KHz)=');\n", +"disp(B,'Minimum Bandwidth(in KHz)=');\n", +"disp(Baud,'Baud rate=');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.3_A: Bandwidth_and_Baud_Rate.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"N=3;// since 8-PSK\n", +"bit_rate=36;// in kbps\n", +"\n", +"Bw=bit_rate*10^(3)/N;\n", +"baud=bit_rate*10^(3)/N;\n", +"n=bit_rate*10^(3)/Bw;\n", +"\n", +"disp(Bw,' Minimum Bandwidth(in Hz)=');\n", +"disp(baud,'Baud rate=');\n", +"disp(n,'Bandwidth efficiency(in bits per second per cycle of bandwidth)=');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.3: Baud_Rate_and_Bandwidth.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"bit_rate=36;// information bit rate in Kbps\n", +"m=3;// since 8-PSK\n", +"\n", +"Baud=bit_rate*10^(3)/m;\n", +"Bw=36*10^(3)/m;\n", +"n=36000/12000;\n", +"\n", +"disp(Baud,'Baud=');\n", +"disp(Bw,'BW=');\n", +"disp(n,'Bandwidth efficiency(in bits/cycle)=');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.4_A: Nyquist_Bandwidth.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"\n", +"Input_bit=5; //Input bit rate in Mbps\n", +"\n", +"//bit rate in I,Q,C channels is one-third of input bit rate\n", +"\n", +"fbI=Input_bit/3;//bit rate in I channel\n", +"fbC=Input_bit/3;//bit rate in C channel\n", +"fbQ=Input_bit/3;////bit rate in I channel\n", +"\n", +"Baud=fbI;//Baud in Mbps\n", +"\n", +"fa=fbC/2;\n", +"\n", +"//Output from Modulator is \n", +"// 0.5cos(2*pi*49.17MHz)-0.5cos(2*pi*50.83MHz)\n", +"\n", +"Nyquist=50.83-49.17;\n", +"\n", +"disp(Nyquist,'Minimum Nyquist Bandwidth(in MHz)=');\n", +"\n", +"" + ] + } +], +"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 +} |