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In this chapter we'll remind you all the basics required for a better understanding of a wireless transmission.
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For that, we will talk about the unit, the decibel, as it might be a new topic for some of you.
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We'll discuss its interest and its use.
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We will then introduce the terms dBm, RSSI, sensitivity, transmitted power, received power and link
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budget.
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And finally, we will talk about the influence of noise in LoRa transmission and how LoRa achieved
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to transmit data when noise become much higher
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than the data itself.
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With all these notions we'll be much more comfortable with technical documentation when it comes to discuss
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about the performances of a transceiver.