搜索结果: 1-15 共查到“工学 Wideband”相关记录27条 . 查询时间(0.142 秒)
Wideband signals show promise for Galileo development and GPS modernization because they provide sharper correlation peaks and thus more accuracy.
A Non-Uniform Sampler for Wideband Spectrally-Sparse Environments
Non-uniform sampler compressed sensing wideband ADC indium-phosphide HBT sample-and-hold
2015/6/17
We present a wide bandwidth, compressed sensing based non-uniform sampling (NUS) system with a custom sampleand-hold chip designed to take advantage of a low average sampling rate. By sampling signals...
Interference Cancellation in Wideband Receivers using Compressed Sensing
Compressed Sensing Interference cancellation wideband receivers LNA
2014/12/8
Previous approach for narrowband interference cancellation based on compressed sensing (CS) in wideband receivers uses orthogonal projections to project away from the interference. This is not effecti...
Power Efficient Continuous-Time Delta-Sigma Modulator Architectures for Wideband Analog to Digital Conversion
Analog-to-Digital Conversion CMOS Integrated Circuit Continuous-Time Delta-Sigma Modulator Low-Power Wideband
2014/11/7
This work presents novel continuous-time delta-sigma modulator architectures with low-power consumption and improved signal transfer functions which are suitable for wideband A/D conversion in wireles...
20-Gb/s Error-Free Wireless Transmission Using Ultra-Wideband Photonic Transmitter-Mixer Excited with Remote Distributed Optical Pulse Train
Photodiodes Radio frequency photonics
2015/5/26
Photonic transmitter-mixers with ultra-wide O-E/modulation bandwidths excited by remote-distributed pulse trains for 20Gbps error-free wireless transmission is presented. The S/N ratios and output pow...
Compact and wideband optical 90o hybrid based on a one- way tapered MMI coupler
Compact wideband optical 90o hybrid based apered MMI coupler
2015/5/21
We report compact and wideband 90o hybrid with a one-way tapered 4×4 MMI waveguide. The fabricated device with a device length of 198 μm exhibited a phase deviation of <±5.4o over a 70-nm-wide spectra...
Generation of Ultra-wideband Doublet Pulses Based on Kerr Shutter Using an Elliptically Polarized Beam in Bismuth Oxide-based Nonlinear Optical Fiber
Ultra-wideband Doublet Pulses Kerr Shutter Elliptically Polarized Beam
2015/5/15
We demonstrate a nonlinear signal-processor incorporating a Bismuth-based nonlinear fiber for UWB doublet pulse generation. High quality of doublet pulses is readily generated from the signal-processo...
Design and ground plane optimization of a CPW-fed ultra-wideband antenna
Printed antennas UWB CPW
2011/3/22
In this paper, an ultra-wideband antenna based on an egg-shaped conductor and a co-planar waveguide (CPW) feed is presented. The ground plane incorporates an egg-shaped slot with parametrized center a...
Low-profile, Modular, Ultra-Wideband Phased Arrays
antenna arrays common mode dipole planar arrays SATCOM ultrawideband
2014/11/7
Ultrawideband (UWB) phased antenna arrays are critical to the success of future multi-functional communication, sensing, and countermeasure systems, which will utilize a few UWB phased arrays in place...
Broadband radio over fiber systems, which can simultaneously distribute multiple wireless services and enable remote sensing, are reviewed. The systems are used to demonstrate improved remote passive ...
Ultra-wideband radio-over-fiber techniques and networks
Fiber optics ptical communications Radio frequency photonics
2015/6/8
This paper summarizes the motivations and results obtained regarding the optical distribution of a 60GHz radio signal throughout buildings to provide users with Ultra-Broad-Band Wireless Home Area Net...
100 GHz Ultra-wideband Wireless System for the Fiber to the Antenna Networks
Fiber optics communications Optical communications
2015/6/8
We experimentally demonstrate an optical ultra-wideband (UWB) (75GHz-110GHz)fiber-to-the-antenna (FTTA) system using our developed W-band near-ballistic unitraveling-carrier photodiode (NBUTC-PD) base...
Novel Generation and Transmission of 2 Gbps Impulse Radio Ultra Wideband over MMF for In-Building Networks Application
Optical communications Radio frequency photonics.
2015/6/5
We propose novel generation technique of IR-UWB pulse by linearly combining two monocycles using different pulse shapes. We experimentally demonstrate DSP based BER measurement of 2 Gbps IR-UWB over m...
Simulation and design of a wideband T-shaped photonic crystal splitter
photonic crystal photonic band gap beam splitter T-junction finite difference time
2011/5/9
In this paper, a high efficiency 2-D T-shaped photonic crystal beam splitter is proposed. It consists
of a square lattice of GaAs rods (n = 3.4) embedded in air. The photonic crystal structure
propo...
Active Ultra-Wideband Tag Design for Concrete Debris Tracking Systems
Ultra-Wideband Tag Concrete Debris Tracking Systems
2010/3/5
Compared with the traditional high-speed video camera measurement method, ultra-wideband (UWB) technology is valuable in the detection and tracing of debris throw during explosion, due to its distinct...