High Speed DMT for 224 Gb/s and Faster Wireline Transmission

This paper presents a high data rate wireline Discrete Multitone (DMT) transceiver capable of operating at 252 Gbps and higher for short range chip-to-chip and chip-to-module applications. The use of DMT allows for higher spectral efficiency than PAM SERDES systems, using similar bandwidth as proposed 224 Gb/s PAM-4 systems but achieves higher data rates. Data rates have improved over other published wireline DMT designs with the use of narrow sub-channels with both adaptive bit-and power-loading along with a combined transmit and receive side equalization. Simulation and measured results show that the transmit side pre-compensation has improved the BER by a factor of 10(4) at 250 Gb/s. The system is measured over a channel with a loss of 18 dB at 50 GHz, showing a data rate of 252 Gb/s with a BER of 10(-6), and a data rate of 400 Gb/s with a BER of 10(-2).

Automated summary

This paper presents a high data rate wireline Discrete Multitone (DMT) transceiver capable of operating at 252 Gbps and higher. It achieves higher spectral efficiency than PAM SERDES systems, and improves data rates over other wireline DMT designs. The system has been measured with a loss of 18 dB at 50 GHz, showing data rates of 252 Gb/s with a BER of 10(-6), and 400 Gb/s with a BER of 10(-2).