搜索结果: 1-15 共查到“Wideband”相关记录36条 . 查询时间(0.086 秒)
Optimal Link Adaptation in Wideband CDMA Systems
Optimal Link Adaptation Wideband CDMA Systems
2015/7/8
We develop a general framework for optimizing link adaptation for multiuser CDMA systems in the wideband limit. The framework is then used to solve for the optimal power control policy that minimizes ...
Optimal Power Control for CDMA Systems in the Wideband Limit
Optimal Power Control CDMA Systems Wideband Limit
2015/7/8
Traditional methods for solving multiuser control problems in CDMA systems do not scale well as the number of users in the system increases. To address this problem we develop a wideband limit approxi...
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...
A wideband analog correlating spectrometer for millimeter astronomy
Simulation The spectrometer Mm astronomy Broadband analog spectrometer Circuit board delay line The input signal
2014/12/9
This project developed an analog correlating spectrometer intended for use in millimeter Astronomy. It is based in part on the Wideband Analog Spectrometers (WASP and WASP-II) built by Harris, et al (...
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...
Estimation of frequency modulations on wideband signals; applications to audio signal analysis
Estimation frequency modulations wideband signals applications audio signal analysis
2013/6/14
The problem of joint estimation of power spectrum and modulation from realizations of frequency modulated stationary wideband signals is considered. The study is motivated by some specific signal clas...
Generalized Interference Models in Doubly Stochastic Poisson Random Fields for Wideband Communications: the PNSC(alpha) model
Interference models Cox Process Doubly Stochastic Poisson Stable Process Isotropicα-stable Complexα-stable
2012/9/19
A general stochastic model is developed for the total interference in wideband systems, denoted as the PNSC(α) Interference Model. It allows one to obtain, analytic representations in situations where...
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...
Wideband Spectrum Sensing at Sub-Nyquist Rates
Wideband Spectrum Sensing Sub-Nyquist Rates
2010/12/15
Spectrum sensing refers to the task of identifying the frequency support of a given input
signal. Standard radio-frequency (RF) lab equipment can provide this functionality. An
example is a spectrum...