Pulse width modulation (PWM) has recently been proposed for analog optical fronthauling in centralized radio access networks (CRANs) to avoid the bandwidth expansion of digital fronthauling (e.g., common public radio interface protocol, CPRI). At the transmitter, the radio-signal is mapped onto the duration of an on/off keyed optical signal, while at the fiber receiving-end each PW optical modulated sample is digitized so that the overall analog communication link is transparent. In this framework, we propose a new architecture for optical transmission of PW modulated signals, based on the reflection at the remotized antennas of a seeding signal originated at the baseband unit (BBU). Pros and cons of PWM fronthauling in reflective passive optical network (PON) are evaluated by investigating the outcomes of an in-lab experiment that implements a CRAN fronthauling of 100-MHz RF signals with single-carrier 64QAM modulation up to 20-km standard single mode fiber. Experimental results provide some room for discussion on PWM fronthauling technique.

PWM fronthauling in reflective PON

COMBI, LORENZO;GATTO, ALBERTO;MARTINELLI, MARIO;PAROLARI, PAOLA;SPAGNOLINI, UMBERTO
2016

Abstract

Pulse width modulation (PWM) has recently been proposed for analog optical fronthauling in centralized radio access networks (CRANs) to avoid the bandwidth expansion of digital fronthauling (e.g., common public radio interface protocol, CPRI). At the transmitter, the radio-signal is mapped onto the duration of an on/off keyed optical signal, while at the fiber receiving-end each PW optical modulated sample is digitized so that the overall analog communication link is transparent. In this framework, we propose a new architecture for optical transmission of PW modulated signals, based on the reflection at the remotized antennas of a seeding signal originated at the baseband unit (BBU). Pros and cons of PWM fronthauling in reflective passive optical network (PON) are evaluated by investigating the outcomes of an in-lab experiment that implements a CRAN fronthauling of 100-MHz RF signals with single-carrier 64QAM modulation up to 20-km standard single mode fiber. Experimental results provide some room for discussion on PWM fronthauling technique.
EUCNC 2016 - European Conference on Networks and Communications
9781509028931
9781509028931
analog fronthauling; Cloud-RAN; optical PWM; Optical waveforms; reflection-based fronthauling; Computer Networks and Communications
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1001954
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact