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New Heltec V3 ESP32 LoRa OLED Step By Step
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Video Source: www.youtube.com/watch?v=jHWepP1ZWTk
LoRa (LoRaWAN) is a new modulation technique optimised for long range, low power, low bitrate communication. You'll often hear people say LoRa uses Chirp Spread Spectrum', but this alone is only a small part of the story. LoRa uses an elegant mathematical trick to allow more efficient receivers. In this video, I outline how LoRa modulation works - it is incredibly unique. I was amazed how LoRa can communicate well beneath the noise floor. I tested the performance of LoRa with a Matlab livescript demonstration. • 00:00 Introduction • 01:00 Chirps as the basis for LoRa • 04:20 Towards a mathematical description of the LoRa symbol • 09:00 Correlation • 12:34 Our first attempt at a receiver • 13:12 Towards a more efficient receiver using a mathematical trick • 16:40 Performance of LoRa • 18:54 Matlab code to simulate a LoRa system • 26:32 Summary
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