产生一组随机的0、1二进制比特序列，分别用2ASK, 2FSK, 2PSK和2DPSK四种调制方式把它们调制到一个较高的载频上,结果给出前8个比特所对应的时域波形。-0,1 generate a set of random binary bit sequence, respectively 2ASK, 2FSK, 2PSK and 2DPSK four kinds of modulation modulation them to a higher carrier frequency, the r