18th Aug, 2019 at 5:01pm (UTC)
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Very low bit rate satellite communications : experiments ?
3rd Aug, 2017 at 3:13pm
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Using transponders configured for Ku band VSAT return links to the hub teleport I've just been doing some link budgets for WSPR transmissions using 1 mW transmit power into a 10cm horn/dish at 14 GHz with hub reception on 1m dish. Using 6 Hz bandwidth I get results like C/N=9 dB.   Is that right ? It sounds a bit improbable to me.

With a bandwidth of 6 Hz the threshold for WSPR operation is a C/N of -2 dB, so the link should work very well with a good link margin of 10 dB or so.

The bit rate is extremely low, 28 bits every 2 minutes, and is rather the opposite to the popular 'broadband' but it should appeal to customers who do not want to send much data.

Read more: https://physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User.pdf

Please say here if you have tried this or similar low data rate experiments.
  
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Re: Very low bit rate satellite communications : experiments ?
Reply #1 - 18th Oct, 2017 at 5:51pm
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The world needs faster internet speed. Do you think, It is really worthwhile to think about lowest streaming data rate !!!!
  
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