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Telecom operators are racing towards upgrading their facilities and broadband services in order to meet the highly challenging 5G operational framework in dense urban landscapes. The oversubscribed sub-6 GHz wireless band is lacking the necessary bandwidth to support the envisioned 5G data rates, suggesting the transition to mm-wave bands as the only viable scenario. In conjunction with the cell densification...
We demonstrated the simultaneous transmission of multiband LTE-A signals, a WiFi IEEE802.11ac and a gigabit/s baseband 4-PAM signal over 1mm core diameter PMMA GI-POF. The optical link used a red light 650 nm laser diode and a p-i-n photodiode with a transimpedance amplifier. The 4-PAM transmission achieved 1.7 Gb/s (BER < 1×10−3), together with 9 LTE-A standard-compliant bands with EVM < 8%...
In this paper we investigate two promising approaches to reduce the optical bandwidth utilization in the mobile fronthaul of next-generation cloud radio access networks. We analyze and compare the performance of an analog radio-over-fiber and a new digital fronthaul in a chromatic dispersion-limited scenario. The former uses several analog channels, generated by up- and down-converting of baseband...
The concept of hybrid polymer optical fibre (POF) and visible light communication (VLC) for in-home networking is experimentally evaluated in this paper. The performance evaluation is based on two schemes of discrete multitone (DMT) and multilevel pulse amplitude modulation (PAM) techniques. The combined effects of modal dispersion of the POF and the limited bandwidth of the phosphor converted illumination...
We experimentally compare OFDM and Single-carrier modulation in a large-capacity optical-wireless signal delivery system at W-band. We conclude that OFDM is more suitable in a scenario of relatively short wireless distance and limited receiver bandwidth.
V-band gapless OFDM RoF system with power detector down-conversion is proposed. We propose and successfully employ a novel Volterra nonlinear compensation to mitigate signal-to-signal beating interference, resulting in 22% data rate improvement with bit-loading algorithm.
In 5G wireless systems, centralized RAN (C-RAN) is an architectural choice where the signal waveforms received by Remote Radio Heads (RRH) are transparently forwarded to base band units (BBU), in many cases using an optical fronthaul. Although C-RAN highly simplifies the RRH, which is positive from the operational cost standpoint, much of the system complexity and cost is shifted towards the optical...
Digital radio over fibre (RoF) technology has been suggested as a promising solution to replace conventional analogue RoF technology for multi-service in-building wireless coverage. However in conventional digital RoF, digitisation leads to high data rates which in turn results in high capital expenditure (CAPEX) and operational expenditure (OPEX). This paper investigates a novel methodology to transmit...
We propose a novel mobile fronthaul transmission scheme to achieve bandwidth-efficient transmission of both the I/Q waveforms of wireless signals and the control words (CWs) between baseband units (BBUs) and remote radio units (RRUs). Unlike the common public radio interface (CPRI) where the I/Q waveforms and the control words are transmitted as a binary sequence in the time domain, the proposed transmission...
This paper presents a techno-economic comparison between classical passive optical networking (PON) and innovative convergent radio and fibre architectures, based on intermediate aggregation at the remote base station (RBS) of both, fixed and mobile subscribers. By aggregating users at an active remote node (ARN) co-located at the RBS, which offers high-speed switching and statistical-multiplexing...
In this paper, we propose an integrated traffic control scheme (ITCS), which facilitates circuit emulation service (CES) for wireless backhaul over a previously proposed experimental optical packet-switched WDM ring network, HOPSMAN. To ensure efficient setup of CES connections, ITCS employs a simple mean-rate-based distributed admission control followed by a novel slot-marking reservation. The total...
This paper presents an innovative high-bandwidth access network architecture that offers transparent transport services for fixed (≥ 1 Gbps) and mobile applications (LTE and beyond). The main novelty is the development of a high-functionality, low-energy active remote node (ARN) offering high-speed switching and statistical-multiplexing features for maximal exploitation of available network resources,...
Integrated service delivery in short-reach in-building networks can cost-effectively be implemented using POF. Its bandwidth limits are overcome by advanced modulation techniques. In larger buildings, wavelength routing in an SMF point-to-multipoint topology improves network performance.
Mixed integer linear programs for minimum cost FiWi deployment and survivability of the resultant network under nodes failure are formulated and evaluated. Number of potential installation sites determines the network's feasibility and survivability.
In this paper we present an in-home optical network infrastructure based on 1 mm core diameter graded-index plastic optical fibre. A combined transmission of a multi-gigabit baseband data stream, based on discrete multitone modulation, and a radio frequency signal, based on ultra wideband technology, is shown. A detailed experimental study on the performance of the two types of signals in the combined...
Photonic transmitter-mixers with ultra-wide O-E/modulation bandwidths excited by remote-distributed pulse trains for 20Gbps error-free wireless transmission is presented. The S/N ratios and output power are greater than sinusoidal excitation.
A novel high bandwidth optical wireless communication system for indoor applications with both ubiquitous coverage and mobility feature is proposed and tradeoffs are studied. We successfully demonstrate a 1 Gbps diffused beam wireless link to verify the feasibility of this system through proof-of-concept experiments for the first time.
Optical and wireless technologies have complementary characteristics in capacity and mobility. This talk describes our research toward the convergence of both optical and wireless technologies to address the needs of future access networks.
The optical and wireless communication systems convergence will activate the potential capacity of photonic technology for providing the expected growth in interactive video, voice communication and data traffic services that are cost effective and a green communication service. The last decade growth of the broadband internet projects the number of active users will grow to over 2 billion globally...
We propose a novel generation technique for IR-UWB signal employing the weighted sum of modified doublets. We experimentally demonstrate a DSP-based BER measurement of 2 Gbps IR-UWB over 100m PF GI-POF for in-building network applications.
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