diff options
| author | kinitrupti | 2017-05-12 18:53:46 +0530 |
|---|---|---|
| committer | kinitrupti | 2017-05-12 18:53:46 +0530 |
| commit | 6279fa19ac6e2a4087df2e6fe985430ecc2c2d5d (patch) | |
| tree | 22789c9dbe468dae6697dcd12d8e97de4bcf94a2 /Analog_and_digital_communication_by_S_Sharma/Chapter4.ipynb | |
| parent | d36fc3b8f88cc3108ffff6151e376b619b9abb01 (diff) | |
| download | Python-Textbook-Companions-6279fa19ac6e2a4087df2e6fe985430ecc2c2d5d.tar.gz Python-Textbook-Companions-6279fa19ac6e2a4087df2e6fe985430ecc2c2d5d.tar.bz2 Python-Textbook-Companions-6279fa19ac6e2a4087df2e6fe985430ecc2c2d5d.zip | |
Removed duplicates
Diffstat (limited to 'Analog_and_digital_communication_by_S_Sharma/Chapter4.ipynb')
| -rwxr-xr-x | Analog_and_digital_communication_by_S_Sharma/Chapter4.ipynb | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/Analog_and_digital_communication_by_S_Sharma/Chapter4.ipynb b/Analog_and_digital_communication_by_S_Sharma/Chapter4.ipynb new file mode 100755 index 00000000..de531ca7 --- /dev/null +++ b/Analog_and_digital_communication_by_S_Sharma/Chapter4.ipynb @@ -0,0 +1,367 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:caca8dab0d3857abcaf7d3628393a15e93a869b003e981e40fff14ea15639860"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 4 - Radio receivers"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1 - pg 150"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the image frequency and rejection ratio in both cases\n",
+ "import math\n",
+ "from math import sqrt\n",
+ "#given data\n",
+ "Q = 100.#quality factor\n",
+ "f_i = 455.*10**3#intermediate frequency\n",
+ "\n",
+ "#calculations\n",
+ "#first case\n",
+ "f_s = 1000.*10**3#incoming frequecy of first case\n",
+ "f_si = f_s + 2*f_i#image frequency of first case\n",
+ "p = (f_si/f_s) - (f_s/f_si);\n",
+ "alpha = sqrt(1+(Q**2*p**2))#rejection ratio of first case\n",
+ "#second case\n",
+ "f_s1 = 25.*10**6#incoming frequecy of second case\n",
+ "f_si1 = f_s1+ 2*f_i#image frequency of second case\n",
+ "p1 = ((f_si1/f_s1) - (f_s1/f_si1)); \n",
+ "alpha1 = sqrt(1+(Q**2*p1**2))#rejection ratio of second case\n",
+ "\n",
+ "#results\n",
+ "print \"(i)a.Image frequency of first case (kHz)\",f_si/1000.\n",
+ "print \" b.Rejection ratio of first case = \",round(alpha,1)\n",
+ "print \" (ii)a.Image frequency of second case (MHz) = \",round(f_si1/10**6,2)\n",
+ "print \" b.Rejection ratio of second case = \",round(alpha1,2)\n",
+ "print \"Note: Their is mistake in textbook in the calculation of rejection ratio\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i)a.Image frequency of first case (kHz) 1910.0\n",
+ " b.Rejection ratio of first case = 138.6\n",
+ " (ii)a.Image frequency of second case (MHz) = 25.91\n",
+ " b.Rejection ratio of second case = 7.22\n",
+ "Note: Their is mistake in textbook in the calculation of rejection ratio\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2 - pg 150"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the image frequency and rejection ratio in both cases\n",
+ "import math\n",
+ "from math import sqrt\n",
+ "#given data\n",
+ "Q = 90.\n",
+ "f_i = 455.*10**3#intermediate frequency\n",
+ "\n",
+ "#calculations\n",
+ "#first case\n",
+ "f_s = 950.*10**3#incoming frequency of first case\n",
+ "f_si = f_s + 2*f_i#image frequency of first case\n",
+ "p = (f_si/f_s) - (f_s/f_si);\n",
+ "alpha = sqrt(1+(Q**2*p**2))#rejection ratio of first case\n",
+ "#second case\n",
+ "f_s1 = 10.*10**6#incoming frequecy of second case\n",
+ "f_si1 = f_s1+ 2*f_i#image frequency of second case\n",
+ "p1 = ((f_si1/f_s1) - (f_s1/f_si1)); \n",
+ "alpha1 = sqrt(1+(Q**2*p1**2))#rejection ratio of second case\n",
+ "\n",
+ "#results\n",
+ "print \"(i)a.Image frequency of first case (kHz)\",f_si/1000.\n",
+ "print \" b.Rejection ratio of first case = \",round(alpha,1)\n",
+ "print \" (ii)a.Image frequency of second case (MHz) = \",round(f_si1/10**6,2)\n",
+ "print \" b.Rejection ratio of second case = \",round(alpha1,2)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i)a.Image frequency of first case (kHz) 1860.0\n",
+ " b.Rejection ratio of first case = 130.2\n",
+ " (ii)a.Image frequency of second case (MHz) = 10.91\n",
+ " b.Rejection ratio of second case = 15.73\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3 - pg 151"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the quality factor and new intermediate frequency\n",
+ "#given\n",
+ "import math\n",
+ "from math import sqrt\n",
+ "a1 = 130.5#rejection ratio\n",
+ "f_s = 10.*10**3#incoming frequency\n",
+ "print (\"from fig 4.8 from t/b we can write that\")\n",
+ "\n",
+ "#calculations\n",
+ "#first case\n",
+ "alpha = 130.5#from problem 4.2 of first case\n",
+ "alpha2 = 15.72#from problem 4.2 of second case\n",
+ "alpha1 = alpha/alpha2#rejection ratio ofgiven RF amplifer\n",
+ "p1 =.174#from problem 4.2 of second case\n",
+ "Q = (sqrt(alpha1**2 - 1)/p1)#quality factor\n",
+ "#second case\n",
+ "p2 = 1.45#from problem 4.2 of second case\n",
+ "f_si =1860.*10**3#from problem 4.2 of second case\n",
+ "f_i = 950.*10**3#incoming frequency\n",
+ "f_i1 = 10.*10**6#good image frequency\n",
+ "f_si1 = (f_si*f_i1)/f_i; #image frequency\n",
+ "f_i2 = (f_si1 - f_i1)/2#new intermediate frequency\n",
+ "\n",
+ "#results\n",
+ "print \"(i)Quality factor = \",round(Q,2)\n",
+ "print \"(ii)New intermediate frequency (MHz) = \",round(f_i2/10**6,3)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "from fig 4.8 from t/b we can write that\n",
+ "(i)Quality factor = 47.36\n",
+ "(ii)New intermediate frequency (MHz) = 4.789\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5 - pg 152"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the local oscillator frequency and image frequency rejection ratio\n",
+ "import math\n",
+ "from math import sqrt\n",
+ "#given\n",
+ "IF = 455.*10**3#intermediate frequency in hertz\n",
+ "f_s = 900.*10**3#signal frequency in hertz\n",
+ "Q = 80.#quality factor\n",
+ "\n",
+ "#calculations\n",
+ "f_0 = f_s + IF#local oscillator frequency\n",
+ "f_si = f_s + 2* IF#image frequency\n",
+ "p = (f_si/f_s)-(f_s/f_si)\n",
+ "a = sqrt(1+(Q*p)**2)#image frequency rejection ratio\n",
+ "\n",
+ "#results\n",
+ "print \"(i)Local oscillator frequency (kHz) = \",f_0/1000.\n",
+ "print \"(ii)Image frequency (kHz) = \",f_si/1000.\n",
+ "print \"(iii)Image frequency rejection ratio = \",a\n",
+ "print \"Note:Their is mistake in textbook in the calculation of image frequency\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i)Local oscillator frequency (kHz) = 1355.0\n",
+ "(ii)Image frequency (kHz) = 1810.0\n",
+ "(iii)Image frequency rejection ratio = 121.114011776\n",
+ "Note:Their is mistake in textbook in the calculation of image frequency\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 6 - pg 153"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the image frequency, rejection ratio\n",
+ "import math\n",
+ "from math import sqrt\n",
+ "#given\n",
+ "Q = 125. #quality factor\n",
+ "\n",
+ "#calculations\n",
+ "#first case\n",
+ "IF1 = 465.*10**3#intermediate frequency\n",
+ "f_s1 = 1.*10**6#incoming frequency for first case in hertz\n",
+ "f_s2 = 30.*10**6#second incoming frequency for first case in hertz\n",
+ "f_si1 = f_s1 + 2*IF1#image frequency for incoming frequency 1MHz for first case\n",
+ "f_si2 = f_s2 + 2*IF1#image frequency for incoming frequency 30MHz for first case\n",
+ "p1 = (f_si1/f_s1)-(f_s1/f_si1);\n",
+ "p2 = (f_si2/f_s2)-(f_s2/f_si2);\n",
+ "alpha1 = sqrt(1+(Q*p1)**2);#rejection ratio at 1MHz incoming frequency\n",
+ "alpha2 = sqrt(1+(Q*p2)**2);#rejection ratio at 30MHz incoming frequency\n",
+ "#second case\n",
+ "f_s3 = 1.*10**6#incoming frequency for second case in hertz\n",
+ "f_si3 = (f_si1*f_s2)/f_s3#image frequency\n",
+ "IF2 = (f_si3-f_s2)/2.#intermediate frequency\n",
+ "\n",
+ "#results\n",
+ "print \"(i)a.Image frequency for 1MHz incoming frequency (kHz) = \",f_si1/1000.\n",
+ "print \" b.Rejection ratio for 1MHz incoming frequency = \",round(alpha1,2)\n",
+ "print \" c.Image frequency for 30MHz incoming frequency (MHz) = \",f_si2/10**6\n",
+ "print \" d.Rejection ratio for 30MHz incoming frequency =\",round(alpha2,2)\n",
+ "print \"(ii)intermediate frequency for second case (Hz) = \",round(IF2/10**6,1)\n",
+ "print 'The answers are a bit different from textbook due to rounding off error'"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i)a.Image frequency for 1MHz incoming frequency (kHz) = 1930.0\n",
+ " b.Rejection ratio for 1MHz incoming frequency = 176.49\n",
+ " c.Image frequency for 30MHz incoming frequency (MHz) = 30.93\n",
+ " d.Rejection ratio for 30MHz incoming frequency = 7.7\n",
+ "(ii)intermediate frequency for second case (Hz) = 13.9\n",
+ "The answers are a bit different from textbook due to rounding off error\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7 - pg 173"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the range of local oscillator frequency and image frequency\n",
+ "#given\n",
+ "fs1=3 #MHz\n",
+ "fs2=30 #MHz\n",
+ "IF=40.525 #MHZ\n",
+ "#calculations\n",
+ "f01=fs1+IF\n",
+ "f02=fs2+IF\n",
+ "fsi1=fs1+2*IF\n",
+ "fsi2=fs2+2*IF\n",
+ "#results\n",
+ "print 'The range of local oscillator frequency is ',f01,'MHz to',f02,'MHz'\n",
+ "print 'The range of image frequency is ',fsi1,'MHz to',fsi2,'MHz'"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The range of local oscillator frequency is 43.525 MHz to 70.525 MHz\n",
+ "The range of image frequency is 84.05 MHz to 111.05 MHz\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8 - pg 174"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#calculate the Q factor of RF amplifier\n",
+ "#given\n",
+ "fr=1*10**6 #Hz\n",
+ "BW=10.*10**3 #Hz\n",
+ "#calculations\n",
+ "Q=fr/BW\n",
+ "#results\n",
+ "print 'Q factor = ',Q"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Q factor = 100.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 13
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |