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

Figure 13

Received constellation for OSTBC MIMO antenna systems with code rate 2 with discriminating levels at SNR 40 dB and 30 dB for 3×3 and 4×4 antenna systems in (a) and (b), respectively, using QPSK modulation technique with angle 65.49° in (a) and 14.2° in (b).

(a)

(b)