CPC H04B 1/69 (2013.01) [H04L 27/265 (2013.01); H04B 2001/6912 (2013.01)] | 20 Claims |
1. A method for message validation in chirp spread spectrum (CSS) comprising:
receiving one or more training chirps in a preamble of a message;
processing each of the one or more training chirps using a fast-Fourier transform (FFT) to generate an FFT result;
accumulating the FFT results of the one or more training chirps;
determining that the accumulated FFT results exceed a detection threshold;
determining, based on the detection, a symbol timing;
receiving a single opposite chirp in the preamble of the message using the determined symbol timing, wherein the single opposite chirp is subsequent to the one or more training chirps, and wherein the single opposite chirp comprises an identifier;
decoding the single opposite chirp to determine the identifier; and
terminating processing of the message when the determined identifier fails to match a predetermined identifier.
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