Performance Analysis of MIMO-STBC Systems with Higher Coding Rate Using Adaptive Semiblind Channel Estimation Scheme

Table 3

Comparison of received constellation for different transmitting antennas with their code rates and required rotation angle.

Modulation type	Antenna configuration	Code rate	Discriminating SNR level	Required angle	Remarks
16-QAM	3×3	1	23 dB	36.89^∘	Figure 10(a)
QPSK	3×3	1	23 dB	8.92^∘	Figure 10(b)
QPSK	3×3	1/2	35 dB	1.5^∘	Figure 11(a)
QPSK	4×4	1/2	25 dB	18.48^∘	Figure 11(b)
QPSK	3×3	3/4	40 dB	1.8^∘	Figure 12(a)
QPSK	4×4	3/4	30 dB	3.2^∘	Figure 12(b)
QPSK	3×3	2	40 dB	65.49^∘	Figure 13(a)
QPSK	4×4	2	30 dB	14.2^∘	Figure 13(b)