Abstract

We aim to maximize the flexibility of access networks by combining two trends: digital signal processing (DSP)-based physical (PHY) layer technologies and network function virtualization (NFV). We implement an advanced DSP-PHY on a general-purpose server. However, given that the server must handle high data transfer rate, the transfer time is a significant issue for softwarizing DSP-PHY. This article proposes a pipeline architecture that adopts split assignment of the transfer stream; it can execute data transfer and DSP-PHY calculation in parallel which significantly reduces the processing time. We implement on a graphic processing unit (GPU) a 5-Gbit/s coherent receiver DSP handling the output of a 40-Gbit/s analog-to-digital converter. As evaluated in an optical system, our proposal significantly relaxes the processing time requirement for DSP algorithm calculations; the processing time margin is 11.2 times greater than that of previous work. An additional digital filter is also successfully implemented in real time; it offers an optical power budget of 47.2-dB, a gain of 2-dB.

Coherent Receiver DSP Implemented on a General-Purpose Server for a Full Software-Defined Access System

Sang-Yuep Kim, Takahiro Suzuki, Jun-Ichi Kani, and Akihiro Otaka
J. Opt. Commun. Netw. 11(1) A96-A102 (2019)

Exploiting general purpose hardware in optical access systems [Invited]

Sang-Yuep Kim, Takahiro Suzuki, Jun-Ichi Kani, and Jun Terada
J. Opt. Commun. Netw. 12(2) A182-A189 (2020)

Real-time transmission of geometrically-shaped signals using a software-defined GPU-based optical receiver

Sjoerd van der Heide, Ruben S. Luis, Sebastiaan Goossens, Benjamin J. Puttnam, Georg Rademacher, Ton Koonen, Satoshi Shinada, Yoshinari Awaji, Alex Alvarado, Hideaki Furukawa, and Chigo Okonkwo
Opt. Express 30(15) 27171-27179 (2022)

Parallel implementation of all-digital timing recovery for high-speed and real-time optical coherent receivers

Xian Zhou and Xue Chen
Opt. Express 19(10) 9282-9295 (2011)

Virtualized PON based on abstraction, softwarization, and service chaining for flexible and agile service creations [Invited]

Takahiro Suzuki, Sang-Yuep Kim, Jun-ichi Kani, and Tomoaki Yoshida
J. Opt. Commun. Netw. 15(1) A39-A48 (2023)