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In this paper the time-slot coding scheme is experimentally demonstrated using imaging receiver to provide multiple access for indoor optical wireless communications. The system capacity of 8 Gb/s is achieved for up to 12 users.
Cloud radio access network (Cloud-RAN) has great potentials to improve energy efficiency and increase capacity of wireless networks. In this paper, we study the green communication for Cloud-RANs. Instead of only focusing on the transmit power consumption, we minimize the network power consumption which includes not only transmit power consumption but also circuit power consumption. In addition, we...
An optical wireless personal area communication system supporting multiple users is experimentally demonstrated based on 16-CAP modulation combined with TDM. Error-free communication is achieved with 10 Gb/s data rate for up to 10 users.
Wireless factory automation has been receiving much interest in recent years due to its advantages of low cost and high flexibility over the traditional wired networks. Factory automation is also considered as one of the important use-cases of the 5th generation (5G) cellular system. In this paper, we present comprehensive system level simulation results to evaluate the performance of LTE and new...
Ultra-dense network (UDN) has been considered as one of the advanced technologies in 5G. With the increasing requirements on quality of service (QoS), large numbers of connections and very high area throughput density, various access points (APs) are deployed densely to provide desired services to user terminals. Then how to choose the optimal AP among neighbor candidate APs for accessing to the network...
An optical wireless personal area communication system is experimentally demonstrated based on 16-CAP modulation combined with TDM for multi-user function. 4 Gb/s data transmission with an average BER< 10−4 for up to 10 users can be achieved at 2 m distance.
This paper will outline proof-of-concept demonstrations of multi-Gigabit/s optical wireless transmission and will discuss challenges faced by the optical wireless in meeting Tutu re requirements such as supporting multiple users, low profile transceivers and resilience against noise and obstructions.
In this paper, we review our recent progress in optical wireless communication systems incorporating infra-red free-space link for in-building personal area networks. We have previously demonstrated a high-speed infrared optical wireless system incorporating localization function that enables limited mobility. Our system is based on light-of-sight transmission but with slightly diffused beam to relax...
Optical technologies have long been investigated to provide efficient backhaul transport for mobile networks and have the potential to also provide direct wireless transmission to support ultra-high-speed connectivity. In this paper, we review our recent progress in optical wireless communication systems utilizing infrared free space link for in-building personal area networks.
To enjoy rich Internet services, contemporary mobile devices generate heavy loads of computation tasks, which cannot be suffered locally due to the limited computing and energy capacities of each device. Cloud radio access network (Cloud RNA) based heterogeneous structure is widely accepted as a promising way to make up devices' shortage and computation need. To determine whether the computation task...
A space-time-coded 10 Gb/s indoor optical wireless communication system with robustness to physical shadowing is proposed and investigated. Experimental results show that the bit-error-rate performance can be improved by about 40%.
A novel 3-dimensional indoor localization system based on the optical wireless technology is proposed. The height information is obtained by using different signal divergences. Experimental results show that an average localization accuracy of about 8.5 cm can be achieved.
In this paper the recent research progress on highspeed personal area infrared optical wireless communications is reviewed. A 10 Gb/s downlink and up to 2 Gb/s uplink are experimentally demonstrated. The indoor localization function is also summarized.
In this paper, we experimentally demonstrate a full-duplex high-speed indoor optical wireless communication system with 16 Carrierless-Amplitude-Phase (CAP) modulation. Results show that 10 Gb/s downlink and 2 Gb/s uplink can be realized simultaneously.
In this paper, an optical wireless based indoor localization system with background light power estimation capability is proposed and experimentally demonstrated. Results show that an average localization error of 2.41 cm is achieved.
High-speed wireless connectivity in personal areas is highly demanded and the optical wireless technology is a promising solution. In this paper, recent progress of high-speed optical wireless communication systems in personal area networks is briefly reviewed.
This paper discusses the problem of minimizing the energy used to transmit packets over a memoryless channel, with a constraint on the delay suffered by packets and a constraint on peak transmitter power. The problem is studied within discontinuous reception (DRX) supported system. Specifically, we seek a DRX-compatible transmission policy that can solve the problem without the knowledge of fading...
A centralized localization system based on the optical wireless technology for personal areas is proposed and experimentally demonstrated in this paper. A localization accuracy of ∼5.26 cm is achieved.
High-speed wireless communications in personal areas are now highly demanded, given that broadband connectivity has now reached the doorstep of the users' premises. Optical wireless technology has been considered as a promising solution due to the availability of huge unregulated bandwidth. However, the coverage area of optical wireless communication systems is limited because of safety issues and...
Optical wireless technology has been considered as a promising candidate to provide high-speed wireless connectivity in personal work/living spaces. Previously we proposed and demonstrated a high-speed indoor communication system by incorporating limited mobility with localization function. Furthermore, we showed that by using a novel single channel imaging receiver, better system performance can...
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