Experimental Comparison of Uniform and Probabilistically Shaped PAM-8 for IMDD System at Transmission Rates Beyond 200 Gbit/s 华为，德国慕尼黑 对于PAM8信号，概率整形比常规PAM8灵敏度高出1dB 实验结果表明，在接收灵敏度为70和80GBaud时，每个 pam-