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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Geometry and recovery of spectral-sparse signals
频谱稀疏信号 几何 恢复
2023/4/26
Spectral-sparse signals are those sparse in the Fourier domain and are very common in wireless communications, radar, sonar, medical imaging and other applications. Their recovery from noisy, limited ...
延安大学数字信号处理课件Chapter 1 Discrete-Time Signals and Systems
延安大学 数字信号处理 课件 Chapter 1 Discrete-Time Signals and Systems
2018/3/15
延安大学数字信号处理课件Chapter 1 Discrete-Time Signals and Systems。
It is a great pleasure to extend to you a warm invitation to join The 1st International Conference on Signals and Systems 2017 (ICSigSys 2017), to be held 16-18 May 2017 at Grand Sanur Hotel, in Bali,...
Wavelet analysis of the LF radio signals collected by the European VLF/LF network from July 2009 to April 2011
Radio Network Wavelet precursors
2015/8/24
In 2008, a radio receiver that works in very low frequency (VLF; 20-60 kHz) and LF (150-300 kHz) bands was developed by an Italian factory. The receiver can monitor 10 frequencies distributed in these...
Application of empirical mode decomposition to very low frequency signals for identification of seismic-ionospheric precursor phenomena
Earthquake Precursor Phenomena Empirical Mode Decomposition
2015/8/24
This study investigates the application of empirical mode decomposition to signals from very low frequency transmitters in Europe that were received in Thessaloniki, Greece, to provide a method for de...
Multitone signals with low crest factor
Multiple frequency acoustic signal the peak coefficient bandpass crest factor
2015/8/13
Using some results from the recent mathematics literature, we show how to generate signals with perfect low-pass or bandpass spectra which have very low crest factors (under 6dB). An application to mu...
All Optical NRZ-to-RZ conversion for 43-Gbps Signals for Generation of 172-Gbps OTDM Signals Using Intersubband Transition MQW Optical Gate
Generation OTDM Signals Intersubband Transition MQW Optical Gate
2015/7/14
We demonstrate all optical NRZ-to-RZ conversion at a bit rate of 43 Gbps using an intersubband transition optical gate. The converted 2-ps RZ pulses were successfully applied to generate 172-Gbps OTDM...
High Integrity Carrier Phase Navigation for Future LAAS Using Multiple Civilian GPS Signals
High Integrity Carrier Phase Navigation LAAS Multiple Civilian GPS Signals
2015/6/29
In near future, there will be two more civilian GPS signals,at 1227.60 MHz and 1176.45 MHz, in addition to thepresent one at 1575.42 MHz. Of many possible benefits from the three civilian signal...
Effects of Signal Deformations on Modernized GNSS Signals
Signal Deformation Modernized GNSS Signals
2015/6/26
Satellite-based navigation requires precise knowledge of the structure of the transmitted signals.For GPS, accurate knowledge of the shape of the code correlation peaks is required to ensure no biases...
Code Generation Scheme and Property Analysis of Broadcast Galileo L1 and E6 Signals
Code Generation Scheme Broadcast Galileo L1 E6 Signals
2015/6/25
In this paper, we decode the PRN codes of the L1 and E6 signals broadcast by the Galileo GIOVE-A test satellite.We apply the 45.7 m Stanford SRI Dish and the 1.8m dish of the Stanford GNSS Monitor Sys...
Wideband signals show promise for Galileo development and GPS modernization because they provide sharper correlation peaks and thus more accuracy.
Validation of Multiple Hypothesis RAIM Algorithm Using Dual-frequency GNSS Signals
RAIM Algorithm Dual-frequency GNSS Signals
2015/6/25
A Multiple Hypothesis Solution Separation (MHSS) RAIM algorithm was developed at Stanford in recent years, with the purpose of meeting the stringent integrity requirements imposed by the Federal Aviat...
Demonstrations of Multi-Constellation Advanced RAIM for Vertical Guidance using GPS and GLONASS Signals
Multi-Constellation Advanced RAIM Vertical Guidance GPS GLONASS Signals
2015/6/24
In the near future, many more navigation satellites with dual frequency L1 and L5 will be deployed. The increased number of satellites and the possibility of mitigating the ionospheric delay using dua...
Detecting Highly Oscillatory Signals by Chirplet Path Pursuit
Signal Detection Nonparametric Testing Likelihood Ratios Adaptivity Chirps Chirplets Time-Frequency Analysis Gravitational Waves Graphs Shortest Path in a Graph Dynamic Programming
2015/6/17
This paper considers the problem of detecting nonstationary phenomena, and chirps in particular, from very noisy data. Chirps are waveforms of the very general form A(t) exp(iλ ϕ(t)), where λ is ...
Online Non-Negative Convolutive Pattern Learning for Speech Signals
Non-negative matrix factorization convolutive NMF online pattern learning sparse coding speech processing speech recognition
2013/6/28
The unsupervised learning of spectro-temporal patterns within speech signals is of interest in a broad range of applications. Where patterns are non-negative and convolutive in nature, relevant learni...