Dr. Son T. Le Profile

Dr. Son T. Le

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Proceedings Article | 5 March 2021 Presentation + Paper

High-speed real-time transmissions supporting LTE/5G mobile fronthaul networks using discrete multitone format

Son Le, Tomislav Drenski, Andrew Hills, Malcolm King, Theodore Sizer

Proceedings Volume 11713, 117130F (2021) https://doi.org/10.1117/12.2577892

KEYWORDS: Modulation, Wavelength division multiplexing, Temperature metrology, Reliability, Laser sintering

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Future cellular mobile networks will rely on hybrid 4G/LTE-5G technologies to provide wireless coverage and capacity that operators need for consistent service across their geographic footprint. However, this technology trend is creating many challenges in the mobile front-haul (MFH) networks to support the co-existence of Common Public Radio Interfaces (CPRI) and Evolved Common Public Radio Interfaces (eCPRI) traffic with diverse connectivity requirements in terms of capacity and reach. To address this problem, this paper presents a Discrete Multi-Tone modulation (DMT) ASIC fabricated in 16 nm CMOS process which supports flexible data rates in hybrid 4G/LTE-5G MFH networks, including CPRI-10, 25 GbE, 50 GbE, 75 GbE and 100 GbE (eCPRI rates). In addition, this ASIC performs stably over the full industrial temperature range (-40°C to +85°C), making it fully qualified for outdoor MFH applications. Using this DMT ASIC, we demonstrate 400 Gb/s real-time transmission over 40 km of standard single mode fiber (SSMF) in C-band without optical dispersion compensation.

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