Low RF Complexity Photonically Enabled Indoor and Building-to-Building W-Band Wireless Link

Abstract

Abstract:We demonstrate W-band wireless transmission over distances covering both indoor and building-to-building scenarios with a setup of reduced complexity in the RF domain, employing a passive wireless transmitter and envelope detection at the receiver.

225m Outdoor W-Band Radio-over-Fiber Link Using an Optical SFP+ Module

“…They further confirm and adhere to expectations derived from previous experiments in similar conditions [4].…”

“…Mm-wave wireless transmissions for front-and backhaul have been demonstrated in a number of configurations [3,4], of which heterodyning of two independent lasers for photonic upconversion is one of the simplest and most promising for integration of RoF links with existing infrastructure. However in oder to truly enable mm-wave backhaul scenarios they need to be based on technology already used in deployed systems, such as SFP+ modules [1].…”

Outdoor <inline-formula> <tex-math notation="LaTeX">$W$ </tex-math> </inline-formula>-Band Hybrid Photonic Wireless Link Based on an Optical SFP+ Module

“…4 plots the obtained Q factors over distance alongside resulting BER estimates, suggesting a linear relation with distance and thus the system to be limited by available transmitter power and additive white Gaussian noise. They further confirm and adhere to expectations derived from previous experiments in similar conditions [8] and that due to its high directivity the link may be considered practically line-of-sight, even at 225 m wireless distance.…”

“…Further comparison of transmission performance with that found in [8] where a similar setup-in particular the same receiver-was employed, allows estimation of the maximum achievable distance for a system limited by the available RF transmitter power. From the photocurrents observed at the optical to RF conversion stage the RF signal level P PD generated by the PD at a reference optical power of P opt = 5 dBm is easily estimated and found to be −9 dBm.…”

“…Additionally these new front-, mid-and backhaul links must seamlessly tie in with existing optical distribution networks such as passive optical networks (PONs) [1], [7]. Radio-overfiber (RoF) links in the mm-wave range stand out as prime candidates since they combine the relatively large available bandwidths in the mm-wave bands with the easy optical distribution over significant fiber distances [1], [8].…”