Hypervisor-based fault tolerance (HBFT), a checkpoint-recovery mechanism, is an emerging approach to sustaining mission-critical applications. Based on virtualization technology, HBFT provides an economic and transpar...
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A novel semiconductor saturable absorber based on high contrast grating is investigated for the first time. The extremely broad reflection band, low saturation fluence, and large design flexibility make it useful in m...
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作者：
Zhao, SinanLuo, BinDang, AnhongGuo, HongCREAM Group
State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China
Based on weak fluctuation theory and gamma-gamma irradiance distribution model, the combined effect of scintillation and beam wander on ground-to-satellite laser uplink communication systems is analyzed and optimum tr...
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作者：
Han, YaoqiangDang, AnhongTang, JunxiongGuo, HongCREAM Group
State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China
In this paper, we propose a correlation beacon detection scheme for optical wireless link establishment under strong interference conditions. An outdoor experiment is demonstrated and validates that the beacon can be ...
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作者：
Xie, GuodongDang, AnhongGuo, HongCREAM Group
State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China
Coherent differential phase-shift keying (DPSK) transmission system is very suitable for atmosphere channels. Based on Gamma-Gamma channel model, the error probability expressions of three different detection schemes ...
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Optical phase modulator based on OIL-VCSEL is investigated for the first time. Simulation shows a directly modulated OIL-VCSEL can function as a key component in QPSK or 8PSK transmitters. Preliminary phase-shift-keyi...
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The importance of achieving high performance Fourier transforms for Cognitive Radio applications can not be over-emphasized. This includes signal detection in the presence of noise power uncertainty, multi-resolution ...
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ISBN:
(纸本)9781424458868
The importance of achieving high performance Fourier transforms for Cognitive Radio applications can not be over-emphasized. This includes signal detection in the presence of noise power uncertainty, multi-resolution spectrum sensing, minimization of subcarriers' side lobes in OFDM modulators, multi-stream processing, or spectrum loading, for example. With the emergence of advanced multicore processors, there is a remarkable opportunity to develop novel, massively parallel implementations of the FFT. This paper reviews recent advances in the area, and presents results for three classes of devices: the IBM Cell multi-SIMD processor, the Nvidia Tesla SIMT processor, and the EnLight digital optical core device.
As a practical method, the passive scheme is useful to monitor the photon statistics of an untrusted source in a “Plug & Play” quantum key distribution (QKD) system. In a passive scheme, three kinds of monitor m...
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As a practical method, the passive scheme is useful to monitor the photon statistics of an untrusted source in a “Plug & Play” quantum key distribution (QKD) system. In a passive scheme, three kinds of monitor mode can be adopted: average photon number (APN) monitor, photon number analyzer (PNA), and photon number distribution (PND) monitor. In this paper, the security analysis is rigorously given for the APN monitor, while for the PNA, the analysis, including statistical fluctuation and random noise, is addressed with a confidence level. The results show that the PNA can achieve better performance than the APN monitor and can asymptotically approach the theoretical limit of the PND monitor. Also, the passive scheme with the PNA works efficiently when the signal-to-noise ratio (RSN) is not too low and so is highly applicable to solve the untrusted source problem in the QKD system.
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