A5114833730- Advanced Wireless Communication Techniques
- Wireless Communication Networks Research
- Underwater Vehicles and Communication Systems
- Indoor and Outdoor Localization Technologies
- Underwater Acoustics Research
- Photonic and Optical Devices
- Conducting polymers and applications
- Advanced Photonic Communication Systems
- Organic Electronics and Photovoltaics
- PAPR reduction in OFDM
- Advanced Memory and Neural Computing
- Optical Network Technologies
- Nanowire Synthesis and Applications
- Error Correcting Code Techniques
- Semiconductor Lasers and Optical Devices
- Power Line Communications and Noise
- Algorithms and Data Compression
- Multimodal Machine Learning Applications
- Millimeter-Wave Propagation and Modeling
- Advanced Graph Neural Networks
- Dark Matter and Cosmic Phenomena
- Human Mobility and Location-Based Analysis
- Radio Wave Propagation Studies
- Advanced Algorithms and Applications
- Embedded Systems and FPGA Design
Nanjing University of Posts and Telecommunications
2015-2024
Harbin Engineering University
2020-2023
Civil Aviation Administration of China
2023
Ministry of Industry and Information Technology
2020-2023
Beijing University of Posts and Telecommunications
2012-2020
Beihua University
2016
University of Maryland, College Park
2014
University of Science and Technology of China
2012
Rensselaer Polytechnic Institute
2003-2007
Qualcomm (United States)
2007
Conventional double differential phase-shift keying modulation amplifies the phase noise and performs poorly under time-varying direct-sequence spread-spectrum (DSSS) communication system. Therefore, authors propose an iterative reception for DSSS in underwater acoustic channels. First, bit-interleaved coded with decoding integrated multi-symbol detection is used. Second, this paper uses cross correlation method to estimate track Doppler shift of each symbol. Based on estimates, a dynamic...
Reflection-type photoplethysmography (PPG) pulse sensors are widely used in consumer markets to measure cardiovascular signals. Different from off-chip package solutions which the light-emitting diode (LED) and photodetector (PD) separate chips, a GaN integrated optoelectronic chip with novel ring structure is proposed realize PPG sensor. The consists of two multiple-quantum well (MQW) diodes. For higher sensitivities, central peripheral MQW diodes suitable as LED PD, respectively. results...
This paper studies the channel estimation, detection and performance analysis of mobile wireless communication systems employing space-time block codes (STBC), where channels exhibit flat Rayleigh fading with a significant amount Doppler spread. Pilot-symbol-assisted modulation (PSAM) is developed to estimate channels. The estimation evaluated. Maximum-likelihood (ML) first formulated. A linear detector, called symmetric (SL) proposed. An interference cancellation (IC) detector also improve...
A high-performance ultraviolet photodetector based on a thin layer DPPT-TT organic material is experimentally demonstrated. The high absorption of in the band attributed to foundation for detector. device's responsivity can be improved by adequately designing hole-blocking HfO2 and stepped structure at bottom contact. Due self-filtering optical trapping structure, device achieves external quantum efficiency above 100%, even with (around 50 nm). maximum spectral 383 A/W, corresponding...
We report a monolithically integrated ultraviolet (UV) photoelectric switch based on GaN-on-silicon platform for the first time. The novel consists of U-shaped trench metal-oxide-semiconductor field effect transistor (UMOSFET), an InGaN/GaN multiple quantum wells (MQW) UV photodiode (PD), and thin-film resistor. A common blue light-emitting diode epi wafer is adopted to design fabricate without extra epitaxy growth or ion implantation process, which greatly simplifies fabrication. backside...
N-type organic field-effect transistors have suffered from poor environmental instability. Here, we report that, by using nickel (Ni) instead of the commonly used gold (Au) as contact electrodes, n-type polymer showed much improved stability upon annealing in nitrogen and exposure to air. In particular, Au-contacted devices exhibited pronounced ambipolar conduction whereas Ni-contacted retained fairly good unipolar properties. The results are important build stable at low cost.
In the literature, peak-to-average power ratio (PAR) is often used as an indicator for dynamic range of OFDM signals. PAR extreme value statistic and can present overly pessimistic view signal. Instantaneous-to-average (IAR), on other hand, reflects more accurately characteristics sample population. this paper, we show that depending whether clipping allowed to occur, or IAR may be a suitable metric.
Donor-Acceptor (D-A) polymer field-effect transistors (pFETs) are at the cutting edge of organic electronics. However, some fundamental cognition interface states remains unquantified, particularly different dynamic scales. In this study, D-A quantified using pumping method. The experimental results indicate that state density transistor is insensitive to measurement pulse condition and stays within range 1012 1013 cm-2. experiments described in paper provide a quantitative analysis states....
There is growing concern that potentially harmful interference from 5G communications systems in C-band could interfere to the operation of radio altimeters (RA) operating at 4.2 - 4.4 GHz. Some countries and international organizations have already taken remedial action. The minimum distance interferer a measure how close an interfering transmitter can be receiver without causing performance degradation. objective this paper investigate required between mobile base station aircraft when...
The safe and reliable transmission of relay protection signal is essential to the normal operation device. Based on characteristics transmission, this paper proposes a method model real time failure rate communication channel introduced by latency bit error. First all, using decision tree processing history fault data channels, equipment, board equipment various function blocks, get based historical data. On basis, according protect delay error performance requirements for signal, propose...
As a very bandwidth-efficient modulation format, Gaussian minimum shift keying (GMSK) with low bandwidth-time (BT) product value is important for bandwidth-limited satellite communications. The MSK-type linear detector, which works well GMSK signals BT values greater than 0.25, has large performance degradation when detecting low-BT compared the optimum Viterbi equalizer. After decomposing differential precoded signal into component and nonlinear significant energy, we propose two-stage...
Brain-inspired flexible neuromorphic devices are of great significance for next-generation high-efficiency wearable sensing and computing systems. In this paper, we propose a organic electrochemical transistor using poly[(bithiophene)-alternate-(2,5-di(2-octyldodecyl)- 3,6-di(thienyl)-pyrrolyl pyrrolidone)] (DPPT-TT) as the semiconductor poly(methyl methacrylate) (PMMA)/LiClO
Due to the time‐varyingproperty of underwater acoustic (UWA) channel, significant Doppler spread will severely degrade performance direct‐sequence spread‐spectrum (DSSS) communications. The relative velocity variation between transmitter and receiver cause both phase rotation magnitude loss correlation peak, during long transmission DSSS packet. To solve this problem, authors propose a novel transceiver design for UWA At transmitter, triple differential shift keying (D PSK) modulation is...
Since wireless local area network (WLAN) can support high transmission rate with low cost, the use of WLAN is increasing rapidly. The has become very congested, and in dense environment, Overlapping BSS (basic set service) problem may be introduced, which will severely degrade performance network. Transmission power control (TPC) AP (Access Point) considered as one techniques relieve problem. We proposed a novel scheme to ease OBSS mainly based on admission (AC) control. Besides our we also...
High speed Ethernet traffic is important for some system tests which use TCP/IP as the data communication. A software way to do this job brings benefits on robust, but due limitation of CPU, it can not give full line frame, especially where short frame needed. An implementation an embedded high network generator based FPGA introduced. It be used generate arbitrary length PRBS frame. Due process ability FPGA, even when 64 bytes, almost theoretical value, 10 times fast than method.
In this paper, the high-speed modified uni-traveling-carrier photodiode (MUTC-PD) was designed and fabricatedfor low reverse bias. The 3-dB bandwidth responsivity of MUTC-PD with 24-μm mesa diameter at 1-V bias is 22.5 GHz 0.22 A/W wavelength of1550 nm, respectively. dark current device less than 4nA 3.3 V fabricated can achieve high performance confirmed.
Double differential phase shift keying(DDPSK) modulation is an efficient method to compensate the Doppler shifts, whereas noise will be amplified which results in signal-to-noise ratio (SNR) loss. In this paper, we propose a novel receiver architecture for underwater acoustic DSSS communications with shifts. The proposed adopts not only DDPSK but also improved bit-interleaved coded iterative decoding (BICM-ID) algorithm recover SNR demodulator multi-symbol estimation track channel variation,...
As knowledge discovery in databases, data mining means a process of extraction potentially useful information from which can be applied to management, query processing, decision making, control etc. Those are urgently needed improve efficient management water supply industry, since has been recognized by governments worldwide as scarce resource. In response such demand, this paper proposes software application, designed accessing database, operating the mining, and output results charts. We...