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+### TODO
+* refine Bhattacharyya parameters for each payload code before freezing the specification
+* erase symbol or abort if either head or tail data is damaged, as we can't recover anything when that happens
+* implement analog mode (most significant mode bit is 1), where only complex values are the payload
+* re-encode preamble to use entire symbol to update the channel estimation
+* re-encode entire message and output number of bitflips and real SNR
+