a)设二进制序列为 1011010010，矩形脉冲，分别画出相应的单极性不归零、 双极性不归零、单极性归零、双极性归零波形。



b)画出 2ASK 2PSK 2FSK 波形-a) set a binary sequence 1011010010, rectangular pulse, respectively, draw the corresponding NRZ unipolar, bipolar not zero, zero unipolar, bipolar zero waveform.



b) Draw 2ASK 2PSK 2FSK waveform