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As an emerging patient-centric model of health information exchange, cloud-based personal health record (PHR) system holds great promise for empowering patients and ensuring more effective delivery of health care. In this paper, we propose a novel patient-centric cloud-based secure PHR system, which allows patients to securely store their PHR data on the semi-trusted cloud service providers, and selectively...
The maximum transmission reach of 127 Gb/s DP-QPSK over legacy DMF link is extended to 4,800 km with 7.4 dB Q-factor using hybrid nonlinearity compensation and maximum likelihood sequence estimation, amounting to ∼37% distance increase.
Digital coherent optical communication technologies have shown superior performance in supporting high-bit-rate optical communications, including high fiber chromatic dispersion (CD) and polarization mode dispersion (PMD) tolerance, and high spectral efficiency. We review the typical system design and principles of dual-polarization digital coherent optical communications, and further show a new dual-stage...
From Shanon's theory, we know that information capacity is a logarithmic function of signal-to-noise ratio (SNR) but a linear function of the number of dimensions. By increasing the number of dimensions , we can dramatically improve the spectral efficiency. At the same time, in -dimensional space , for the same average symbol energy, we can increase the Euclidean distance between signal...
The dynamic input power range resulting in BER<;10-3 using our proposed joint-SPM compensation scheme can be increased by 0.4 dB and 1.2 dB, compared to separately compensate for SPM at either transmitter or receiver side.
We propose and experimentally demonstrate a novel, dual-stage frequency offset estimator and achieve the widest range of ?? 0.5 times the system symbol rate for the first time in a 42.8-Gbit/s coherent PolMux QPSK receiver.
We present two hard-decision decoding schemes suitable for use in beyond 100 Gb/s optical transmission. The first scheme is based on multidimensional turbo product codes (MTPCs) with component Reed-Solomon (RS) codes. The second scheme is based on generalized low-density parity-check (GLDPC) codes with component RS codes. The proposed schemes perform comparable to recent concatenation of RS and LDPC...
We report a new differential phase-shift keying (DPSK) receiver design which utilizes a single demodulator and can receive polarization division multiplexed signals. This system provides less than 3 dB power penalty at bit-error rate (BER) of 10−9 after 60 km of optical fiber transmission.
Based on an extrinsic information transfer (EXIT) chart assisted receiver design, a low-complexity near-maximum a posteriori (MAP) detector is constructed for high-throughput MIMO systems. A high throughput is achieved by invoking high-order modulation schemes and/or multiple transmit antennas, while employing a novel sphere detector (SD) termed as a center-shifting SD scheme, which updates the SD's...
We present a PMD compensation scheme suitable for use in multilevel coded-modulation schemes, with PMD compensation efficiency comparable to that of OFDM, but with lower complexity of both transmitter and receiver. It is based on Alamouti-type polarization-time coding, with LDPC codes as channel codes.
We designed and built a novel all-optical re-timing, re-amplifying, and re-shaping (3R) regeneration system based on terahertz optical asymmetric demultiplexers (TOADs) developed in our laboratory. The system is capable of parallel processing multiple wavelengths, a feature which will significantly improve the scalability of current wavelength division multiplexing (WDM) networks. Performance against...
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