Make the bit flip guessing a little smarter by correcting towards the 3/4 framing, but only if this character is only one off from a valid character.This is "helped" by the 3/4 framing of SITOR-B, where every character has 3 marks and 4 spaces, resulting in the mark value consistently getting a lower envelope estimation than the space value, even when both are the exact same signal level! However, in the face of selective fading and QRM, the assumption of symmetry proved to be wrong.The flip_smallest_bit code was written with the assumption that the discriminator has equal weights for mark and space, that we are equally likely to get things wrong in each direction, and that flipping the bit with the smallest absolute value is likely to get us what might have been transmitted.make single bit flip correction guess a little smarter.adjust tracking filter constants to improve power detection.
Fix cosmetic issues reported by Bob, VK2YQA.
0 kommentar(er)
