High-SF LoRa chirps can be linearly superposed on low-SF LoRa symbols to carry an extra BPSK stream while keeping standard dechirp-and-DFT demodulation degradation small, with closed-form error rates derived and simulated.
Cloaklora: A covert channel over lora phy
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Design and Analysis of Chirp-Layered Superposition Coding for LoRa
High-SF LoRa chirps can be linearly superposed on low-SF LoRa symbols to carry an extra BPSK stream while keeping standard dechirp-and-DFT demodulation degradation small, with closed-form error rates derived and simulated.