Patent ID: 9473244
Filing Date: 2016-10-18
CPC Classification: H03M,H04B,H04L

Claim Text:
1. A method of transmitting a data signal comprising: integrating a trellis encoder/decoder into a transreceiver receiving a signal at 40Gbaud, the transreceiver providing for 16 quadrative amplitude modulation (QAM) to provide a first and second mode of modulation, the transreceiver including using only four subcarriers each modulating data at a 250Gb/sec data rate at the 40 Gbaud that combine for simultaneous transmission to provide the first mode of modulation at a substantially 1T data transmission rate, and using only two subcarriers each modulating data at 200Gb/sec that combine to provide simultaneous transmission for the second mode of modulation at a substantially 400G data transmission rate, wherein the trellis encoder uses trellis coded modulation to reduce the modulated data to only 200Gb/sec only in the two subcarriers for the second mode of modulation; and transmitting data from the transreceiver via a processor at only a ted substantially 1T data transmission rate or substantially 400G data transmission rate, wherein the data is transmitted at the first mode of modulation with the plurality of first subcarriers with DP16QAM modulation to provide only the substantially 1T data transmission rate, or the data is transmitted from the transreceiver only at the second mode of modulation with the plurality of second subcarriers with trellis coded modulation to provide the substantially 400G data transmission rate.