matlab仿真程序

产生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2；

对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50 ，波形采样率为符号率的8倍，画出前20个符

号对应的波形（同时给出前20位信源序列）

改用HDB3码，画出前20个符号对应的波形

改用密勒码，画出前20个符号对应的波形

分别对上述1000个符号的波形进行功率谱估计，画出功率谱

改变信源“0”的概率，观察AMI码的功率谱变化情况-Produce random binary sequence of length 100 The transmission carrier frequency is 10 times the bit rate, draw a sampling rate of 100 times the symbol rate of the BPSK modulation waveform (first 10 bits), its power spectrum Coherent demodulation of assuming the same as the phase of the transmitting and receiving frequencies, and draw the waveform x (t), assuming that the impulse response of the low pass filter 10 consecutive 1 (the remainder is 0), or 12 consecutive 1 (the remainder is 0), y (t) is drawn under the two filters respectively, and the decision output (10 bits) The received carrier frequency is 10.05 times the bit rate, the same initial phase, draw the waveform x (t), assuming that the impulse response of the low pass filter of 10 consecutive 1, shown under two filter y (t), and decision output (20 bits) DPSK and delay differential coherent demodulation, the carrier frequency is 10 times the bit rate, draw a, b, c, d point of the waveform (first 10 bits) DPSK and delay