A5042616610- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Wireless Communication Technologies
- Photonic and Optical Devices
- Interconnection Networks and Systems
- Full-Duplex Wireless Communications
- PAPR reduction in OFDM
- Radar Systems and Signal Processing
- Advanced Fiber Optic Sensors
- Error Correcting Code Techniques
- Software-Defined Networks and 5G
- Indoor and Outdoor Localization Technologies
- Network Traffic and Congestion Control
- graph theory and CDMA systems
- Electromagnetic Compatibility and Measurements
- Sparse and Compressive Sensing Techniques
- Distributed and Parallel Computing Systems
- Advanced Wireless Communication Techniques
- Cloud Computing and Resource Management
- Underwater Vehicles and Communication Systems
- Energy Efficient Wireless Sensor Networks
- Satellite Communication Systems
Shanghai Jiao Tong University
2015-2024
XinHua Hospital
2024
Army Medical University
2024
Chongqing Medical University
2024
Second Affiliated Hospital of Chongqing Medical University
2024
Dalian Medical University
2024
Hong Kong Baptist University
2023
National University of Defense Technology
2023
Shanghai University
2022
KTH Royal Institute of Technology
2017
Client-side optics are facing an ever-increasing upgrading pace, driven by upcoming 5G related services and datacenter applications. The demand for a single lane data rate is soon approaching 200 Gbps. To meet such high-speed requirement, all segments of traditional intensity modulation direct detection (IM/DD) technologies being challenged. characteristics electrical optoelectronic components the performance modulation, coding, digital signal processing (DSP) techniques stretched to their...
Photonic generation of Terahertz (THz) carriers displays high potential for THz communications with a large tunable range and modulation bandwidth. While many photonics-based generations have recently been demonstrated discrete bulky components, their practical applications are significantly hindered by the footprint energy consumption. Herein, we present an injection-locked heterodyne source based on generic foundry-fabricated photonic integrated circuits (PIC) attached to uni-traveling...
In this paper, we study the problem of data gathering with compressive sensing (CS) in wireless sensor networks (WSNs). Unlike conventional approaches, which require uniform sampling traditional CS theory, propose a random walk algorithm for WSNs. However, such an approach will conform to path constraints and result non-uniform selection measurements. It is still unknown whether method can be used recover sparse signals from perspectives theory graph provide mathematical foundations allow...
Abstract Accurate identification and localization of multiple abnormalities are crucial steps in the interpretation chest X-rays (CXRs); however, lack a large CXR dataset with bounding boxes severely constrains accurate research based on deep learning. We created named CXR-AL14, containing 165,988 CXRs 253,844 boxes. On basis this dataset, deep-learning-based framework was developed to identify localize 14 common calculate cardiothoracic ratio (CTR) simultaneously. The mean average precision...
In this paper, we design a self-interference cancellation (SIC) scheme for in-band full-duplex (IBFD) radio-over-fiber (RoF) systems based on wavelength division multiplexing passive optical network (WDM-PON) architectures. By using single dual-drive Mach-Zehnder modulator (DDMZM), over various bands up to 25 GHz, proposed SIC system can simultaneously cancel the downlink (DL) and modulate recovered uplink (UL) radio frequency (RF) signal. OFDM-RF signals are used study performances of first...
In this paper, we propose a key space enhanced chaos-based encryption scheme with no requirement of redundant sideband information in an orthogonal frequency division multiplexing passive optical network (OFDM-PON). For the first time, simple 1-D chaotic logistic map is employed to scramble subcarrier allocation both time/frequency domain and logical operation, which provides huge enhance physical layer confidentiality. Due dynamic permutations, largest achieved comparison reported schemes...
In this work, a new data-driven fiber channel modeling method, generative adversarial network (GAN) is investigated to learn the distribution of transfer function. Our investigation focuses on joint effects attenuation, chromic dispersion, self-phase modulation (SPM), and amplified spontaneous emission (ASE) noise. To achieve success GAN for modeling, we modify loss function, design condition vector input, address mode collapse long-haul transmission. The effective architecture, parameters,...
Compressive sensing (CS) provides a new paradigm for efficient data gathering in wireless sensor networks (WSNs). In this paper, with the assumption that is sparse we apply theory of CS to WSN where n nodes are randomly deployed. We investigate fundamental limitation both single-sink and multi-sink random under protocol interference model, terms capacity delay. For case, present simple scheme derive bounds capacity. show proposed can achieve Θ(\frac{nW}{M}) delay Θ(M\sqrtfrac{nlog n}), W...
In this paper, we demonstrate a single light-emitting diode (LED) beacon-based 3-D indoor positioning scheme by experiment and theoretical derivation, which can overcome the limitation of multiple LED beacons involved in one process. Only off-the-shelf devices are employed scheme, such as an image sensor, gyroscope, photodiode, have been integrated most commercial available smartphones so that it is compatible with mobile terminals. Moreover, these simple devices, estimate position using...
In this paper, for the first time to best of our knowledge, a polar-coded multiple-input multiple-output (MIMO) free space optical (FSO) communication system is proposed combat turbulence-induced fading. Here, spatially correlated fading, which dominates MIMO FSO aggravation, taken into consideration in system. To evaluate scheme, ergodic capacity gamma–gamma modeled turbulence channel with and without fading studied. The results Monte Carlo simulation show that multiple photodetector scheme...
In view of the application a visible light positioning system in public indoor environment with numerous emitting diodes (LEDs), long delay is one main factors that limits performance moving device. To solve this problem, multiple access scheme based on block encoding time division multiplexing (TDM) proposed paper. our scheme, nine LEDs compose to reduce delay. Meanwhile, order intercell interference, an extended binary coded decimal code used encode signals transmitted by LEDs. The...
In this paper, we investigate power-efficient directed preconfigured cycles (p-Cycles) for asymmetric traffic protection in elastic optical networks (EONs) against single link failure. Owing to the advantage of distinguishing amount two directions, p-cycles consume low power by allocating different spectrum slots and modulation formats each direction. A mixed integer linear programming (MILP) model is formulated minimize total consumption, which takes into account cycle generation,...
We experimentally demonstrate the transmission of a 200 Gbit/s discrete multitone (DMT) at soft forward error correction limit in an intensity-modulation direct-detection system with single C-band packaged distributed feedback laser and traveling-wave electro absorption modulator (DFB-TWEAM), digital-to-analog converter photodiode. The bit-power loaded DMT signal is transmitted over 1.6 km standard single-mode fiber net rate 166.7 Gbit/s, achieving effective electrical spectrum efficiency...
To support massive deployment of broadband radio applications, such as 5G and high-definition videos for terrestrial televisions, large system capacity high spectrum efficiency are highly demanded in over fiber (RoF) systems. In this article, we propose a terabit digital RoF capable providing high-speed transmission, where multicore (MCF) is introduced the access segment between central unit remote unit. Two key technologies that greatly enhance efficiency, namely MCF enabled self-homodyne...
The modeling of optical wave propagation in fiber is a task fast and accurate solving the nonlinear Schr\"odinger equation (NLSE), can enable system design, digital signal processing verification waveform calculation. Traditional full-time full-frequency information split-step Fourier method (SSFM), which has long been regarded as challenging long-haul wavelength division multiplexing (WDM) communication systems because it extremely time-consuming. Here we propose linear-nonlinear feature...
A differential pulse code modulation (DPCM) based digital mobile fronthaul architecture is proposed and experimentally demonstrated. By using a linear predictor in the DPCM encoding process, quantization noise can be effectively suppressed prediction gain of 7~8 dB obtained. Experimental validation carried out with 20 km 15-Gbaud/λ 4-level amplitude (PAM4) intensity direct detection system. The results verify feasibility supporting 163, 122, 98, 81 20-MHz 4, 16, 64, 256 QAM antenna-carrier...
In this letter, first, the symmetric 100-Gb/s time and wavelength-division-multiplexed passive optical network system is experimentally demonstrated, based on directly modulated lasers (DMLs) by 25-Gb/s none-return-to-zero signals. A bypass delay interferometer (DI) deployed in line terminal to mitigate signal distortion caused DML chirp fiber chromatic dispersion. The experimental results show that with DI, error free transmission achieved over 25-km single mode a power budget of 42 dB,...
We propose a stacked wavelength-division-multiplexed orthogonal-frequency-division-multiplexed passive optical network (WDM-OFDM-PON) system that is capable of transmitting 10-Gb/s per wavelength downstream OFDM signals and directly modulated upstream on-off keying (OOK) up to 100 km without any repeater. In this scheme, we use our specially designed electronic controlled liquid tunable filter simultaneously select process signal chirp. By experiment, demonstrate bidirectional transmission...
We propose a spectrally efficient digitized radio-over-fiber (D-RoF) system by grouping highly correlated neighboring samples of the analog signals into multidimensional vectors, where k-means clustering algorithm is adopted for adaptive quantization. A 30 Gbit/s D-RoF experimentally demonstrated to validate proposed scheme, reporting carrier aggregation up 40 100 MHz orthogonal frequency division multiplexing (OFDM) channels with quadrate amplitude modulation (QAM) order 4 and an 10 OFDM...
A monolithically integrated dual-DFB laser generates a 408 GHz carrier used for demonstrating record-high single-channel bit rate of 131 Gbit/s transmitted over 10.7 m. 16-QAM-OFDM modulation and specific nonlinear equalization techniques are employed.
In this paper, we experimentally demonstrate and study a wideband in-band full-duplex (IBFD) wireless communication system based on optical self-interference cancellation (SIC). The SIC performances antennas for broadband IBFD are firstly evaluated within high frequency bands (> 10GHz). system, two electro-absorption-modulated lasers (EMLs) balanced photo-detector (BPD) employed to remove the received signal. By theoretical derivation experimental verification, impact factors of analyzed,...
We propose a microwave photonics system for radio frequency self-interference cancellation using optical techniques. With simple structure, this employs two low-cost directly modulated lasers and balanced photodetector to subtract the strong signal from corrupted received signal. For commonly used wireless applications, 40-dB within 900-MHz band 33-dB 2.4-GHz are experimentally obtained, both over 400-MHz bandwidth. Moreover, ultra-wideband cancellation, achieves more than 27-dB 6-GHz The...
Abstract In recent years, ground‐level ozone (O 3 ) has been one of the main pollutants hindering air quality compliance in China's large city‐clusters including Yangtze River Delta (YRD) region. this work, we utilized process analysis (PA) and higher‐order decoupled direct method (HDDM‐3D) tools embedded Community Multiscale Air Quality model (CMAQ) to characterize O formation sensitivities precursors during a typical pollution episode over YRD region July 2018. Results indicate that...
Abstract Digital twin (DT) modeling is essential to optical fiber communication systems, particularly for enhancing system performance, controlling the in real time, and understanding signal nonlinearity. Conventional split‐step Fourier method ‐based simulations, however, struggle with wide‐band transmissions, plagued by increasing complexity inherent biases due inconsistent link parameter availability. Addressing these challenges, a hybrid data‐driven model‐driven DT approach long‐haul...