16-QAM,64-QAM
The number before QAM (for example 16QAM) refers directly to the number of decision points in the constellation. Meaning, 256QAM has 192 more decision points than 64QAM. The number before QAM is also always a power of two. (EG. 2^6=64QAM)
There are several trade offs to this:
The more Decision points, the more throughput per channel.
The more Decision points, the more
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