中国科学院机构知识库网格系统: 检索

A High-Output-Swing 64-Gb/s PAM-4 Transmitter with a 4-Tap Hybrid FFE in 28-nm CMOS 期刊论文 OAI收割
IEICE ELECTRONICS EXPRESS, 2024, 页码: 6
作者: Xu, Hua; Zheng, Xuqiang; Wang, Zedong; Cai, Chen; Zhen, Wenxiang

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收藏 | 浏览/下载：11/0 | 提交时间：2024/05/20

Baud-spaced de-emphasis BS-DE feed-forward equalizer FFe four level pulse amplitude modulation PAM-4 fractionally spaced pre emphassi FS-Pe high speed transmitter high swing

Measuring the sound speed in deep-sea first sediment layer using a high-frequency submersible sub-bottom profiler: Method and sea trial application 期刊论文 OAI收割
MARINE GEORESOURCES & GEOTECHNOLOGY, 2021, 页码: 11
作者: Qu, Zhiguo; Zou, Dapeng; Shan, Mingguang; Cao, Xinghui; Xie, Yongqiang

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收藏 | 浏览/下载：21/0 | 提交时间：2022/05/26

Deep-sea first sediment layer sound speed measurement high-frequency submersible sub-bottom profiler transceiver combined transducer linear frequency modulation pulse compression

Linear-FM random radar waveform compressed by dechirping method 期刊论文 OAI收割
IET RADAR SONAR AND NAVIGATION, 2019, 卷号: 13, 期号: 7, 页码: 1107-115
作者: Liu, Jiafang; Zhang, Yunhua; Dong, Xiao

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收藏 | 浏览/下载：52/0 | 提交时间：2019/08/26

radar resolution FM radar random noise radar imaging frequency modulation synthetic aperture radar radar detection jamming dechirping compression method digital radio frequency memory repeat jammer random noise waveforms random radar echo signal low-speed analogue-to-digital converter LFM waveform compression high-resolution circular synthetic aperture radar imaging experiment linear-FM random radar waveform linear frequency modulation random radar waveform

Static and Dynamic Characteristics of In(AsSb)/GaAs Submonolayer Lasers 期刊论文 OAI收割
Ieee Journal of Quantum Electronics, 2019, 卷号: 55, 期号: 3, 页码: 7
作者: D.Quandt; D.Arsenijevic; A.Strittmatte; D.H.Bimberg

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收藏 | 浏览/下载：54/0 | 提交时间：2020/08/24

Submonolayer (SML),quantum dot (QD),laser diode,high-speed modulation,quantum-well lasers,dot lasers,gain,threshold,Engineering,Physics,Optics

Temperature measurement method of high temperature and high pressure flow field based on wavelength modulation spectroscopy technology 期刊论文 OAI收割
Acta Physica Sinica, 2019, 卷号: 68, 期号: 23, 页码: 8
作者: B.Q.Zhang; Z.Y.Xu; J.G.Liu; L.Yao; J.Ruan

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收藏 | 浏览/下载：34/0 | 提交时间：2020/08/24

absorbance spectroscopy,wavelength modulation spectroscopy,high,temperature and pressure,combustion flow field,absorption sensor,calibration-free,gas temperature,high-speed,mu-m,h2o,Physics

High precision test method for dynamic imaging of space camera (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Advanced Computer Control, ICACC 2010, March 27, 2010 - March 29, 2010, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
作者: Jin L.-X.; Zhang K.; Zhang K.; Zhang K.; Zhang K.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

A test method for dynamic imaging of space TDICCD (Time Delay and Integration Charge Coupled Devices) camera was presented in this paper. The test method adopted the PLL (Phase Locked Loop) technology and CMAC (Cerebella Model Articulation Controller) friction compensation as control strategy. Furthermore According to this method a test system for dynamic imaging of space TDICCD camera was designed and implemented. The system simulated the movement of the ground objects relative to the space aerocraft to validate the capability of image speed match and the dynamic imaging quality of TDICCD camera. The design adopted a precision turntable and a drift turntable to simulate the movement around the earth and the drift motion in different latitude due to the rotation of earth of the aerocraft. The turntables were drived by permanent magnet torque motor which was powered by PWM (Pulse Width Modulation). The system adopted DSP (Digital Signal Processor) as the control core and reached a very high performance. The experimental results showed that the steady speed error was better than 0.01 % and the instantaneous speed error reached 0.0267%. The precision of the test system designed met the requirement for dynamic imaging of TDICCD camera. 2010 IEEE.

OFDM baseband modulation technology based on VHDL (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Advanced Computer Control, ICACC 2010, March 27, 2010 - March 29, 2010, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
Lin L.; Qiao Y.-F.; Su W.-X.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

In order to improve the transmission velocity in mulitipath fading wireless channel two main advantages are obtained via discussing spectrum utilization ratio of OFDM. Then the high speed OFDM technology receives increasing attentions in mobile communication. Modulation programs are designed with VHDL based on the principle of OFDM in the paper. First from the results of VHDL simulation after OFDM fundamental is introduced the realization of baseband operations such as interleaver subcarrier modulation IFFT and adding CP are presented. Finally implemented programs are validated on the actual implement system. Experimental results indicate that setup time corresponding to transmission velocity is only 71.05s and steady time is approximately 6 times as setup time that is not only achieving the high speed transmission but also supplying adequate modulation time. 2010 IEEE.

Low drive-voltage and high-bandwidth electro-optic modulators based on BaTiO3 thin-film waveguides (EI CONFERENCE) 会议论文 OAI收割
Science and Technology of Dielectrics for Active and Passive Photonic Devices - 210th Electrochemical Society Meeting, October 29, 2006 - November 3, 2006, Cancun, Mexico
Sun D. G.; Fu X. H.; Liu Z. F.; Ho S. T.; Wessels B. W.

收藏 | 浏览/下载：45/0 | 提交时间：2013/03/25

We investigated electro-optic modulator structures to target low drive voltage high-speed modulation and small device size with c-axis grown BaTiO3/MgO ferro-electric thin films. In this study the calculations are focused on the ideal thin film with a quadratic relation between the half-wave drive voltage V and the interaction length L in the electro-optic modulation case we obtained in previous work. With the quadratic electro-optic modulating relation and the optimal rib waveguide structure of BaTiO3/MgO thin films the frequency-voltage-size performances for 2.5GHz 10GHz 40GHz and 100GHz modulation bandwidths have been obtained under half-wave drive voltages of 0.8V 1.6V 3.0V and 4.8V respectively for the ideal film with r51=730 pm/V at 1550nm wavelength where both the phase velocity matching condition and the conductor induced microwave attenuation are considered. The required device lengths to achieve these four typical values of modulation bandwidth are 3.3 mm 0.8 mm 0.4 mm and 0.2 mm respectively. With the c-axis grown BaTiO3/MgO crystal thin films and the quadratic electro-optic modulating relation an electro-optic coefficient of reff=180 pm/V for the c-axis grown BaTiO3/MgO ferro-electric thin films was measured which is relatively far from the ideal value of r51=560 pm/V. copyright The Electrochemical Society.

Single ridge waveguide electroabsorption modulated DFB laser for 2.5Gb/s transmission 会议论文 OAI收割
conference on optical interconnects for telecommunication and data communications, beijing, peoples r china, nov 08-10, 2000
Liu GL; Wang W; Zhang BJ; Chen WX; Zhou F; Zhang JY; Wang XJ; Zhu HL

收藏 | 浏览/下载：18/0 | 提交时间：2010/10/29

MOVPE selective-area-growth electroabsorption modulator distributed feedback laser ridge waveguide high-speed digital modulation optical transmission LIGHT-SOURCE DBR LASER MQW

基于多程位相调制的新型光谱控制技术研究 学位论文 OAI收割
作者: 李玉荣

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收藏 | 浏览/下载：20/0 | 提交时间：2018/12/26

光纤光学 fiber optics 啁啾脉冲放大 chirped pulse amplification 光谱控制 spectrum control 任意波形发生器 high-speed arbitrary waveform generator 位相调制 phase modulation