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diff --git a/Principles_Of_Electronic_Communication_Systems/chapter9.ipynb b/Principles_Of_Electronic_Communication_Systems/chapter9.ipynb new file mode 100755 index 00000000..379e8939 --- /dev/null +++ b/Principles_Of_Electronic_Communication_Systems/chapter9.ipynb @@ -0,0 +1,274 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:3ff4b00636e0eec0da6869f81549546163050c8b991ea646d8083caae0f8dd37"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 9 Communication receivers"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9.1 Page no 318"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "fl =220*10**6\n",
+ "fm =224*10**6\n",
+ "IF1 = 10.7*10**6\n",
+ "IF = 1.5*10**6\n",
+ "\n",
+ "#Calculation\n",
+ "IF2 =IF1+IF\n",
+ "tune_l =fl+IF1\n",
+ "tune_m = fm+IF1\n",
+ "IF1_imgl = tune_l+IF1\n",
+ "IF2_imgm = tune_m+IF1\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) The local oscillatior tuning range is \",tune_l/10**6,\"to \",tune_m/10**6,\"MHz\"\n",
+ "print\"(b) Frequency of the second local oscillator is \",IF2/10**6,\"MHz\"\n",
+ "print\"(c) First IF image range is \",IF1_imgl/10**6,\"MHz to \",IF2_imgm/10**6,\"MHz\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The local oscillatior tuning range is 230.7 to 234.7 MHz\n",
+ "(b) Frequency of the second local oscillator is 12.2 MHz\n",
+ "(c) First IF image range is 241.4 MHz to 245.4 MHz\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9.2 Page no 324"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "R = 100*10**3\n",
+ "T = 273+25\n",
+ "B = 20*10**3\n",
+ "k = 1.38*10**-23\n",
+ "\n",
+ "#Calculation\n",
+ "Vn=(4*k*T*B*R)**0.5\n",
+ "\n",
+ "#Result\n",
+ "print\"The noise voltage across 100k resistor is \",round(Vn*10**6,2),\"microvolt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The noise voltage across 100k resistor is 5.74 microvolt\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9.3 Page no 324"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "R=75\n",
+ "B=6*10**6 \n",
+ "T = 29+273\n",
+ "k =1.38*10**-23\n",
+ "\n",
+ "#calculation\n",
+ "Vn = (4*k*T*B*R)**0.5\n",
+ "\n",
+ "#Result\n",
+ "print\"The input themal noise is \",round(Vn*10**6,2),\"microvolt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The input themal noise is 2.74 microvolt\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9.4 Page no 326"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "Tc=32.2\n",
+ "Tk=273+Tc\n",
+ "B =30*10**3\n",
+ "k =1.38*10**-23\n",
+ "\n",
+ "#Calculation\n",
+ "Pn=k*Tk*B\n",
+ "\n",
+ "#Result\n",
+ "print\"The average noise power is \",round(Pn*10**16,2),\"10**-16 W\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The average noise power is 1.26 10**-16 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9.5 Page no 329"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "SN_ip = 8\n",
+ "SN_op = 6.0\n",
+ "\n",
+ "#Calculation\n",
+ "NR = SN_ip/SN_op\n",
+ "NF = 10*log10(NR)\n",
+ "\n",
+ "#Result\n",
+ "print\"The noise factor is \",round(NR,2)\n",
+ "print\"The noise figure is \",round(NF,2),\"dB\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The noise factor is 1.33\n",
+ "The noise figure is 1.25 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 9.6 Page no 330"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "R= 75.0\n",
+ "T=31+273\n",
+ "k=1.38*10**-23\n",
+ "B=6*10**6\n",
+ "Vs = 8.3*10**-6\n",
+ "NF=2.8\n",
+ "\n",
+ "#Calculation\n",
+ "import math\n",
+ "Vn = math.sqrt(4*k*T*B*R)\n",
+ "Pn = Vn**2/R\n",
+ "Ps = Vs**2/R\n",
+ "SN = (Ps*10**12)/(Pn/10.0**12)\n",
+ "SN_dB =10*log10(SN)\n",
+ "NR = 10**0.28\n",
+ "SN_op = SN/NR\n",
+ "Tn = 290*(NR-1)\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) The input noise power is \",round(Pn*10**12,1),\"pW\"\n",
+ "print\"(b) The input signal power is \",round(Ps*10**12,3),\"pW\"\n",
+ "print\"(c) Signal to noise ratio in decibels \",round(SN/10**24,2)\n",
+ "print\"(d) The noise factor is \",round(NR,2)\n",
+ "print\"(e) Signal to noise ratio of the amplifier is \",round(SN_op/10**24,2)\n",
+ "print\"(f) The noise temperature of the amplifier \",round(Tn,0),\"K\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The input noise power is 0.1 pW\n",
+ "(b) The input signal power is 0.919 pW\n",
+ "(c) Signal to noise ratio in decibels 9.12\n",
+ "(d) The noise factor is 1.91\n",
+ "(e) Signal to noise ratio of the amplifier is 4.79\n",
+ "(f) The noise temperature of the amplifier 263.0 K\n"
+ ]
+ }
+ ],
+ "prompt_number": 23
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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