Comments (1)
(1) The first preamble is the real packet position, while the second is the end of a packet. It is caused by low background noise. Current, I just use a threshold to handle this stuff. It seems that the TIMEOUT outputs are more often. :-(
Also, I observed that some pkt error is caused by mis-interpreation of header, e.g., length. Some loss packets are due to lack of preambles.
(2) Each time, this block only consumes one input item. So it is easy to understand sig[0] = 0 or sig[0] = 1.
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