Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11101891 | Auxiliary channel in PAM/QAM systems using redundant constellation points | Liang Zhang, Cristian Prodaniuc, Jinlong Wei, Changsong Xie | 2021-08-24 |
| 11025405 | High capacity optical data transmission using intensity-modulation and direct-detection | Changsong Xie | 2021-06-01 |
| 11018768 | Transmission systems with controlled bit probabilities | — | 2021-05-25 |
| 11018908 | Pulse amplitude modulation level optimization and equalization in optical systems | — | 2021-05-25 |