LoRa/LoRaWAN tutorial 14: Forward Error Correction and Coding Rate
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This is part 14 of the LoRa/LoRaWAN tutorial.
In this video series different topics will be explained which will help you to understand LoRa/LoRaWAN.
It is recommended to watch each video sequentially as I may refer to certain LoRa/LoRaWAN topics explained earlier.
In this video I will explain what Forward Error Correction and coding rates are.
Forward Error Correction (FEC) is the process where error correction bits are added to the transmitted data.
These redundant bits helps to restore the data when the data gets corrupted by interference.
If more error correction bits are added, the easier the data can be corrected.
However by adding more error correction bits, more data is transmitted which decreases the battery life.
The coding rate refers to the proportion of the transmitted bits that actually carries information.
LoRa allowed coding rate values: CR = 4/5, 4/6, 4/7 or 4/8.
Another notation: CR = 4 / (4 + CR) where CR = 1,2,3,4
If CR=1, CR = 4/5
If CR=2, CR = 4/6
If CR=3, CR = 4/7
If CR=4, CR = 4/8
Check out all my other LoRa/LoRaWAN tutorial videos:
• LoRa/LoRaWAN tutorials
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The presentation used in this video tutorial can be found at:
https://www.mobilefish.com/developer/...
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