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We propose and demonstrate a new 112 Gbps Polarization division Multiplexing digital optical coherent systems with hexagonal 16-QAM (HEX-16-QAM) modulation. In our proposed system we use decision directed dispersion compensation algorithm which is Least Mean Square (LMS) algorithm and single tap decision directed carrier recovery algorithm. We compare the HEX-16-QAM systems with 16-QAM system for...
A Carrier Ethernet Network (CEN) is a versatile, standardized, ubiquitous, carrier-class network. It possess several attributes that distinguish it from Metro Ethernet Networks (MENs), quality of service (QoS) being an integral one. Because CENs are designed to cover large areas (thousands of km) and transmit at high data rates (100 Gbps), these networks have a high bandwidth-delay product (BDP)....
We propose and demonstrate a new blind carrier recovering technique, named, Level Discrimination Carrier Recovery Algorithm (LD-CRA) for optical coherent receiver. Our proposed single tap LD-CRA can blindly compensate the laser phase noise without using any training sequence. Our analysis result found that for 300 KHz linewidth laser, the OSNR penalty is below 1.4dB at 10−3 bit error rate (BER) which...
We propose a new radial directed joint equalization technique for blind adaptive equalization and Carrier Phase Estimation of Quadrature Amplitude Modulation (QAM) in coherent optical fiber communication. By taking the advantages of radial directed constant modulus algorithm (RD-CMA) and multimodulus algorithm (MMA), we introduced a new equalization technique can be call Radial Directed Multi Modulus...
We propose and demonstrate a low complexity non decision directed blind carrier recovery algorithm (NDD-CRA) for 16-QAM optical coherent receivers. Through optimization of step size parameter (μ), we obtained similar performance compared to decision-directed phase estimation algorithm, however, our propose scheme has less complexity compared to the decision directed carrier recovery algorithm (DD-CRA)...
A system architecture based on millimeter-wave wireless over fiber sensor communication networks for avionic system sensing, control and communications is investigated here. The objectives are to study and define the optimal network structures and protocols for the proposed millimeter-wave WSCNs, and evaluate the system performance in terms of reliability, scalability, power consumption and cost....
We review recent experimental demonstrations on optical mm-wave generation and modulation technologies for high-speed radio-over-fiber communication, including the feasibility studies on delivering vector signals over DSB-SC optical mm-wave, duobinary modulation, and Fabry-Perot subharmonic mm-wave generator.
A novel duobinary RF receiver is proposed and demonstrated based on RF envelope detection for millimeter-wave radio-over-fiber systems. Robust RF downconvertion and duobinary decoding are achieved simultaneously at an RF envelope detector. Duobinary signal delivery over wired and wireless link in coherent single-sideband optical millimeter-wave systems is demonstrated for the first time.
We propose and demonstrate a cost-effective wireless over optical fiber access system using frequency quintupling technique. A 2.5-Gb/s OOK signal at 60-GHz is successfully transmitted through 30-km SSMF and 10-ft air link without dispersion compensation.
We designed and experimentally demonstrated a cost-effective RoF system for downstream 1-Gb/s OOK/BPSK and 2-Gb/s 16QAM-OFDM signals using only one single-drive MZM by driving both RF and bias ports, and upstream 1-Gb/s OOK signal.
We propose and demonstrate a simple and improved absorption geometry using micro-hole architecture for micro concentrating photovoltaic (MCPV). Each micro concentrator is coupled with a very small C-Si solar cell. The incident light is concentrated by micro concentrator on the coupled small area thick film photovoltaic (PV). The PV is designed using proposed micro-hole based architecture to facilitate...
Carrier Ethernet is becoming the dominating backhaul network due to its flexibility, scalability, interoperability and low-cost. Carrier Ethernet networks (CENs) are inherently high bandwidth-delay product (BDP) networks, hence Traditional TCP, and similar variants, make undesirable choices of transport protocol mainly because of the aggressive multiplicative-decrease algorithm. The Ethernet-Services...
We propose and experimentally demonstrate a 60-GHz RoF system to support 3M (multi-service, multiband and MIMO) data distribution. Spectral efficiency is improved and system capacity is doubled by using 2×2 MIMO spatial multiplexing.
We propose a 60GHz wireless access network scheme with centralized LO service delivered to mobile terminals and base stations from the central office. Bidirectional transmission based on the scheme has been experimentally demonstrated.
We proposed and demonstrate simple and efficient absorption geometry using slanted micro-hole architecture for planer C-Si solar cell. Our analysis result found that the proposed architecture can enhance the absorbance and the ultimate efficiency is over 28%.
To overcome the fundamental limitation of conventional optical-carrier-suppression, we proposed a novel heterodyne optical-carrier-suppression to achieve centralized up/down-conversion in the radio-over-fiber system. Full-duplex 60-GHz BPSK transmission has been achieved after 25-km single-mode fibers.
We quantify performance of 112-Gb/s PDM-QPSK WDM systems using TrueWave REACH, AllWave, and Ultra-Large Area fibers. Experimental results identify linear and nonlinear transport regimes and yield margin and OSNR penalties against to FEC BER limits.
We demonstrated a novel optical wireless architecture to provide 12.5Gb/s wireless signal at 60GHz mm-wave and 100Gb/s symmetrical wireline service. Some novel enabling techniques are employed to overcome fiber dispersion, reduce the cost and provide super-broadband service.
We propose a novel self-mixing duobinary RF receiver structure for 60-GHz radio-over-fiber systems, which simultaneously downconverts and decodes RF duobinary signals at Nyquist limit. Error-free transmission at 4Gb/s over 25-km SMF-28 and 4-ft wireless is demonstrated.
We propose and demonstrate a new Non-Decision Aid Modified Least Mean Square (NDA-MLMS) algorithm for joint blind equalization and carrier recovery. The bit error rate (BER) of 10−3 is achieved with less than 1.9dB OSNR penalty for 14Gbaud 4-QAM system after 100km transmission and 500 KHz linewidth laser.
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