6QAM通过带限信道，设码元速率为1000波特，传输信道特性为滚降系数为0.75的滚升余弦频谱的滤波器，试建立测试模型并观察接收信号（等效基带信号）的眼图、星座图和相位转移轨迹图。simulink模型-6QAM through the band-limited channel, located at 1000 baud symbol rate, the transmission channel characteristics for the roll-off factor of 0.75 of spectrum raised cosine filter roll and try to create a test model and observe the received signal (the equivalent baseband signal) of the eye diagram, constellation and phase transfer trajectories. simulink model