Quadrature-amplitude modulation (QAM) is a form of quadrature modulation in which both the carriers are amplitude-modulated. The following table shows the supported M-ary number for QAM.
To get a reliable constellation, specify the number of symbols that are greater than the minimum number specified in the following table.
|M-QAM||Minimum Number of Symbols|
|4, 8, 16||500|
|32, 64, 128, 256||1,500|
The following images show the default symbol map used by each of the QAM modulation types.