Figure 1
From: Blind recognition of space-time block code in MISO system
The features of 5 STBCs. This illustrates the features in the form of a decision tree. First, SM and Alamouti codes are recognized by the values of Amari 1=10 log[I1(R1)], Amari 2=10 log[I2(R1)], and Amari 5=10 log[I(T)]. Then the OSTBC3 with the rate 1/2 is recognized by the values of Amari3=10 log[I1Re(R1)]. Finally, Amari 4=10 log[I4(R1)]and Amari6=10 log[I3(R3)] are used to distinguish the first code of OSTBC3 with the rate 3/4 from the second code of OSTBC3 with the rate 3/4.