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A theoretical and experimental investigation of the nonlinear behaviors of intra- and inter-band cross-modulation (XM) in a multiband radio-over-fiber (RoF) system is presented for the first time. A closed-form theoretical analysis is proposed to characterize and validate the data XM induced by the nonlinearity of optical Mach-Zehnder modulator (MZM). Nonlinear behaviors of the intra-band XM between...
Small-cell systems based on cloud radio access network (cloud-RAN) architecture have been proposed as promising solutions to meet the ever-increasing capacity demand of the next-generation wireless access networks. By centralizing the processing power to reduce the complexity of conventional cell sites, the cloud-RAN architecture is ideal for large-scale small-cell system at reduced capital and operational...
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.
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 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 a converged optical wireless access architecture using radio-over-fiber technology to deliver medical data and images independent of data bit rates, formats, and protocols. We have transported real-time, uncompressed telepathology images over 25-km fiber.
For the first time, multi-band vector signal delivery over DSB-SC RoF system generated via single-stage optical upconversion has been accomplished through LO power enhancement, and was successfully demonstrated over 100-km fiber and 5-meter wireless.
A mini-invasive system ASIC for multiple bladder pressure measurement function is presented. Not only can the period of measurement be adjusted, the flexibility is also enhanced by using a tunable IA (instrumentation amplifier). Because the pressure inside the body cavity (i.e., bladder) usually does not vary drastically, a long-term mode is required to save the battery power for a reliable observation...
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