CPC H04B 10/25 (2013.01) [H04B 10/505 (2013.01); H04B 10/5161 (2013.01); H04B 10/66 (2013.01)] | 21 Claims |
1. A method comprising:
receiving a pulse-amplitude modulated (PAM4) electrical signal at a transmitter for transmission to a receiver;
decoding the PAM4 electrical signal into a pair of non-return-to-zero (NRZ) electrical signals;
converting the pair of NRZ electrical signals into a corresponding pair of NRZ optical signals including a first NRZ optical signal and a second NRZ optical signal;
transmitting the first NRZ optical signal to a receiver over an optical communication channel; and
transmitting the second NRZ optical signal to the receiver over the optical communication channel, wherein the transmitter is configured to switch between a PAM4 signal transmission and an NRZ signal pair transmission.
|