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   "source": [
    "# Chapter 1 Introduction to Radio Communication Systems"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Example 1_3 pgno:3"
   ]
  },
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     "text": [
      "The transfer function has no finite zeros \n",
      "The poles \n",
      "[-0.25+0.96824584j -0.25-0.96824584j]\n"
     ]
    }
   ],
   "source": [
    "\n",
    "#Chapter 1:Introduction to Radio Communication\n",
    "#example 1.3 page no 3\n",
    "#given\n",
    "import numpy\n",
    "print('The transfer function has no finite zeros ')\n",
    "p=numpy.array([1, 0.5, 1])\n",
    "x=numpy.roots(p)\n",
    "print('The poles ')\n",
    "print(x)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Example 1_4 pgno:8"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
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   },
   "outputs": [
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     "name": "stdout",
     "output_type": "stream",
     "text": [
      "the image frequency is  MHz 1.91\n"
     ]
    }
   ],
   "source": [
    "\n",
    "#Chapter 1:Introduction to Radio Communication Systems\n",
    "#example 1.4 page no 8\n",
    "#given\n",
    "fIF=455*10**3#intermediate frequency\n",
    "fO=1.455*10**6#oscillator frequency\n",
    "fIM=fIF+fO#image frequency\n",
    "print'the image frequency is  MHz',fIM*1e-6\n"
   ]
  }
 ],
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