A5100363572- Optical Network Technologies
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Optical Network Technologies
- Radio Frequency Integrated Circuit Design
- PAPR reduction in OFDM
- Error Correcting Code Techniques
- Advanced Fiber Optic Sensors
- Advanced Power Amplifier Design
- Semiconductor Lasers and Optical Devices
- CCD and CMOS Imaging Sensors
- Power Line Communications and Noise
- Millimeter-Wave Propagation and Modeling
- Working Capital and Financial Performance
- Advanced Algorithms and Applications
- Sports Performance and Training
- Image Processing Techniques and Applications
- Sensorless Control of Electric Motors
- Firm Innovation and Growth
- Embedded Systems and FPGA Design
- Optical Wireless Communication Technologies
- Multilevel Inverters and Converters
- Blind Source Separation Techniques
- Sports Analytics and Performance
Fudan University
2022-2025
State Key Laboratory of ASIC and System
2024-2025
Zhejiang University
2021-2025
Beijing Jiaotong University
2023-2024
State Key Laboratory of Modern Optical Instruments
2021-2024
Harbin University of Science and Technology
2022
Xuzhou Medical College
2022
Fudan University Shanghai Cancer Center
2022
Hunan Normal University
2021
Hebei University of Engineering
2020
The transmission of a 65,536-ary quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) signal supported by hybrid fiber-terahertz (THz) multiple-input multiple-output (MIMO) system at 320 GHz is experimentally demonstrated in this Letter. We adopt the polarization (PDM) technique to double spectral efficiency. Based on 23-GBaud 16-QAM link, 2-bit delta-sigma (DSM) quantization enables 65,536-QAM OFDM over 20-km standard single-mode fiber (SSMF) and 3-m 2 ×...
We propose and experimentally verify a photonics-aided W-band millimeter wave (MMW) radio-over-fiber (RoF) polarization-multiplexed envelope detection system for high-order quadrature amplitude modulation (QAM) signals. To solve the problem of low spectral efficiency common public radio interface (CPRI) severe distortion QAM detection, quantization noise suppressed delta-sigma (DSM) is introduced into system. The experimental results show that can transmit 131072 signals when meeting error...
An experimental demonstration of the ultra-large-capacity terahertz (THz)-wave signal transmission over a 20-km wired and 54-m wireless distance in an 80-channel wavelength division multiplexing (WDM) system is successfully realized for first time, to best our knowledge. Based on optical asymmetric single-sideband (ASSB) modulation advanced digital processing (DSP) algorithms, we achieve record line rate 6.4 Tbit/s (net 5.12 Tbit/s) THz-over-fiber communication system. This can provide...
We have experimentally demonstrated, for the first time, FPGA-based real-time photonics-aided W-band with envelope detector (ED) 23 Gb/s probabilistic shaping (PS) 64QAM DMT signals over 40.5-m wireless link, which creates longest distance and largest rate an ED-based transmission in world.
This Letter proposes a probabilistic shaping delta-sigma modulation technique. By performing on the probability signal at transmitting end, under same transmit power and net bit rate, based can obtain better anti-noise capability than only. Under information entropy conditions, error rate performance of PS-based 131072QAM modulated by is that ordinary 65536QAM using scheme, lower soft decision–forward correction (4 × 10 −2 ).
A terahertz (THz)-over-fiber multiple-input multiple-output (MIMO) transmission of 4096-ary quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) supported by 46-GBaud phase shift keying (QPSK) signal at 320 GHz is experimentally demonstrated in this letter. By employing the polarization (PDM) technique and 1-bit delta-sigma (DSM) quantization, we successfully implement 4.6-GHz 4096-QAM OFDM over 20 km standard single-mode fiber (SSMF) a 3-m MIMO wireless...
In this Letter, we propose a dual-polarized coherent millimeter-wave system based on differential delta-sigma modulation (D-DSM) intended for long-distance wireless transmission in the W-band. The proposed can transmit polarization-division-multiplexed (PDM) D-DSM signals with orders up to 4194304QAM over channel 4.6 km at signal baud rate of 20 G. After transmission, successfully achieve bit error (BER) lower than hard-decision forward correction (HD-FEC) 3.8 × 10
The probabilistic shaping (PS) technique can effectively reduce the average power of transmitted signal by transmitting high-energy symbols with low probability and low-energy high probability, which helps to improve tolerance system nonlinear effect fiber. In this work, a low-complexity intra-symbol bit-weighted distribution matching (Intra-SBWDM)-based PS 16-ary quadrature amplitude modulation (PS-16QAM) scheme is implemented commercial off-the-shelf field programmable gate array chip for...
In this experiment, we demonstrate a real-time intensity modulation and direct detection (IM/DD) system based on field programmable gate array (FPGA). For high-speed parallel signal processing, propose implement the simplified parallel-constant modulus algorithm (CMA) decision-directed least mean square (DDLMS) equalizers with low complexity latency. Moreover, bit-class probabilistic shaping (PS) scheme is adopted very few hardware resources. The digital processing (DSP) steps are...
We experimentally demonstrated a low-complexity probabilistic shaping (PS) 16-ary quadrature amplitude modulation (16QAM) scheme based on intra-symbol bit-weighted distribution matching (Intra-SBWDM) for discrete multi-tone (DMT) symbols with field-programmable gate array implementation in an intensity and direct detection (IM-DD) system. Different from the traditional PS such as Gallager many-to-one mapping, hierarchical constant composition matching, Intra-SBWDM lower computation hardware...
We propose and experimentally demonstrate a low-complexity constant modulus algorithm (CMA) based on FPGA for 4-channel wavelength-division-multiplexing passive optical network (WDM-PON) employing 4-level pulse amplitude modulation (PAM4). The processes the 4 wavelength channels sequentially. In order to reduce logic resources required by parallel equalization algorithm, an optimization structure of mode (PCMA) was proposed in this paper. Different from classic all-parallel CMA, our PCMA...
We propose a low-complexity equalization scheme with non-uniform quantization and rotational update mechanism (RUM). The is verified in implementation of DDLMS for 92-Gbaud 10-km offline 14.7456-Gbaud 25-km FPGA-based real time PA M4 IM/DD experimental transmission, results show up to 99.5% multiplications (DSP resource usage) are reduced comparing normal equalizer . A large number equivalent taps can be achieved based on several active taps.
We experimentally demonstrated a low-complexity probabilistic shaping (PS) 64QAM-OFDM in an IM-DD-based W-band RoF System. After 45-km SSMF and 4-m wireless transmission, the experimental results show that its receiver sensitivity is better than of uniformly distributed-OFDM (UD-OFDM).
Abstract A multi‐object silicon photonic spectrometer with N input ports is proposed and realized by integrating a multi‐channel passband optical filter (POF), tunable narrow‐band as well calibration‐free × 1 Mach–Zehnder switch (MZS) array. Here, the POF consisting of multimode waveguide grating (MWG) mode (de)multiplexer used to achieve broadened working window an enhanced dynamic range for present spectrometer, while thermally‐tunable Euler micro‐ring resonator (EMR) achieving very high...
A novel digital mobile fronthaul (MFH) architecture combining delta-sigma modulation (DSM) and the chirp-managed technique is proposed to enhance spectral efficiency dispersion tolerance. In MFH, one-bit DSM based on an optimized 4th-order cascaded resonator feedback (CRFB) circuit utilized as digitization interface quantize high-order 1024/4096 quadrature amplitude (QAM) orthogonal frequency division multiplexing (OFDM) signals. The digitized on-off keying (OOK) signals are transmitted over...
In this experiment, we demonstrated an intensity modulation and direct-detection (IM/DD) system based on a field-programmable gate array (FPGA). The PAM8 signals are successfully delivered at 44.2368 Gbit/s over 45-km standard single-mode fiber (SSMF), satisfying the soft-decision forward error correction (SD-FEC) criterion of 2.4 × 10-2, net bit rate may reach 36.864 without need optical amplifiers. At transmitter, used pruned pre-equalization algorithm to process signals, high-speed...
We experimentally demonstrated Chromatic Dispersion (CD) robust Delta-Sigma Modulation (DSM) for high-order QAM mobile fronthaul. By using Duobinary (DB) encoding technology, the anti-dispersion ability of DSM signal is effectively enhanced. At same time, DB coding technology can compress bandwidth to a certain extent, thereby further improving spectral efficiency digital fronthaul based on technology. Through joint scheme and DSM, we successfully realized 30 km fiber transmission 30G baud...
ABSTRACT: The labor force constitutes a paramount factor of production in the realm business operations. In past, China's abundant significantly boosted productivity for firms. However, as demographic dividend gradually wanes, concerns have arisen regarding scarcity force, exacerbating worries about rising costs. Therefore, focusing on enhancing firms' investment efficiency becomes pivotal. Using sample A-stock listed firms China from 2013 to 2020, we examine impact customer concentration...
We experimentally demonstrated a low-complexity probabilistic shaping scheme in real-time 16QAM-OFDM-based WDM-PON. The PS-OFDM signal with net rate of 131.88- Gb/s transmission over 25-km SSMF can be achieved the BER less than 3.8×10 -3 .