Research Article

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

Figure 11

Received constellation for OSTBC MIMO antenna systems with code rate 1/2 with discriminating levels at SNR 35 dB and 25 dB for and antenna systems in (a) and (b), respectively, using QPSK modulation technique with angle 1.5° in (a) and 18.48° in (b).
304901.fig.0011a
(a)
304901.fig.0011b
(b)