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Post by helloitsahmed on Nov 1, 2010 20:02:11 GMT -5
Compute a satellite link budget for a GPS satellite’s 400 MHz downlink having a transmit power of 1 Watt, 100 kHz bandwidth, 10^-5 BER, dish antenna on the ground, and maximal earth coverage from the satellite antenna. It is you job to size the antennas and take into account the range of distances the GPS satellites are from any point on the ground. The period of a GPS satellite is 12 hours, and the earth has a radius of 6378 km.
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Post by charan langton on Nov 21, 2010 22:25:05 GMT -5
Compute a satellite link budget for a GPS satellite’s 400 MHz downlink having a transmit power of 1 Watt, 100 kHz bandwidth, 10^-5 BER, dish antenna on the ground, and maximal earth coverage from the satellite antenna. It is you job to size the antennas and take into account the range of distances the GPS satellites are from any point on the ground. The period of a GPS satellite is 12 hours, and the earth has a radius of 6378 km. G/T for a ground antenna is equal to = Satelitte EIRP - free space loss(function of the frequency) - k - other losses. - margin - Reqd Eb/NO. These are all covered in my link budget tutorial with enough detail that you should be able to compute them. Which of these is the problem? Charan Langton |
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