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Table 1 Theoretical value of some HOMs and HOCs without noise

From: A new method to solve the problem of facing less learning samples in signal modulation recognition

 BPSKQPSK8PSK16QAM64QAM4ASK8ASK
C21111110.580.53
M401− 100.680.6190.890.73
M20100000.580.53
C402100.680.6190.120.13
M421111.321.380.890.73
M21111110.580.53
C42− 2− 1− 1− 0.68− 0.62− 0.12− 0.13
C42/C21− 2− 1− 1− 0.68− 0.62− 0.12− 0.46
M631111.962.231.771.28
C634442.081.79− 0.53− 0.39
C63/C214442.081.79− 2.73− 2.56