Blind recognition of space-time block code in MISO system

EURASIP Journal on Wireless Communications and Networking

Table 1 The features of different STBCs

Code	Features
SM	Amari 1<ε₁; Amari 5>ε₅
Alamouti	If s_i belongs to modulation scheme I, Amari 1<ε₁ and Amari 5<ε₅;
	If s_i belongs to modulation scheme II, Amari 1>ε₁, Amari 5<ε₅, Amari 2<ε₂,
	Amari 3<ε₃
$\frac{3}{4}$ OSTBC3	Amari 1>ε₁, Amari 2>ε₂, Amari 3>ε₃;
Code 1	If s_i belongs to modulation scheme I, Amari 4>ε₄, Amari 6<ε₆
	If s_i belongs to modulation scheme II, Amari 4>ε₄, Amari 6<ε₆
$\frac{3}{4}$ OSTBC3	Amari 1>ε₁, Amari 2>ε₂, Amari 3>ε₃;
Code 2	If s_i belongs to modulation scheme I, Amari 4<ε₄, Amari 6<ε₆
	If s_i belongs to modulation scheme II, Amari 4>ε₄, Amari 6>ε₆
$\frac{1}{2}$ OSTBC3
Code 3	Amari 1>ε₁, Amari 2>ε₂, Amari 3<ε₃

Amari 1=10 log[I₁(R₁)], Amari 2=10 log[I₂(R₁)], Amari 3=10 log[I₁Re(R₁)], Amari 4=10 log[I₄(R₁)], Amari 5=10 log[I(T)], Amari 6=10 log[I₃(R₃)]. ε₁, ε₂, ε₃, ε₄, ε₅, and ε₆ are thresholds to discriminate the features of different STBCs.