Results 281 to 290 of about 3,164,796 (323)

Channel modeling for spread spectrum via evolutionary transform

2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004
Given the importance of direct sequence spread spectrum (DSSS) communications, the modeling of its transmission channel is of great interest. Due to multipath and Doppler effects in the transmission channel, the transmitted signal is spread in both time and frequency.
L.E. Chaparro, A. Alshehri
openaire   +1 more source

Multi-taper S-transform method for evolutionary spectrum estimation

Mechanical systems and signal processing, 2022
Z. Huang, You‐lin Xu, T. Tao
semanticscholar   +1 more source

Evolutionary Algorithms Based Sparse Spectrum Waveform Optimization

2011
This chapter presents a technique to determine a suite of 'optimal' waveforms (in the Pareto sense) for a single platform radar system performing multiple radar missions simultaneously. The authors contend that a waveform suite can be determined by applying the Strength Pareto Evolutionary Algorithm 2 (SPEA2) developed by Zitzler et al.
openaire   +1 more source

Strategy Analysis of an Evolutionary Spectrum Sensing Game

2014
Evolutionary game has been shown to greatly improve the spectrum sensing performance in cognitive radio. However, as selfish users are shortsighted for the long-term profits, they are not willing to collaborate to sense. In this paper, we propose an evolutionary spectrum sensing game to improve the long-term spectrum utilization.
Dongsheng Ding, Guoyue Zhang, Donglian Qi, Huhu Zhang   +3 more
openaire   +1 more source

Fault Diagnosing of Large Rotating Machinery Using Evolutionary Spectrum

Manufacturing Science and Engineering, 1998
Abstract Fault diagnosis of large rotating machinery sets is very important for many industry sectors. However, it is also difficult because of its complexity. The conventional fault diagnosis methods are based on FFT spectral analysis.
Minping Jia, R. Du
openaire   +1 more source

An Evolutionary Spectrum Model of Nonstationary Seismic Ground Motions Considering Extended Source Effect for Engineering Purposes

, 2020
Ding Wang, Cong Li, Chaoxiong Yan, Jun Xu, F. Kong   +4 more
semanticscholar   +1 more source

Evolutionary Power Spectral Densities Compatible with a Given Response Spectrum

Civil-Comp Proceedings, 2009
(atti su CD)
openaire   +2 more sources

Spectrum Allocation in Cognitive Radio Networks Using Evolutionary Algorithms

2012
One of the key objectives of evolving communication technologies is to maximize the utilization of the available spectrum by increasing the number of simultaneous users while reducing interferences among users. In cognitive radio networks, this problem is referred to as the spectrum allocation problem, and is shown to be NP-Hard.
Abdelbaset S. Hamza, Haitham S. Hamza, Mona M. El-Ghoneimy   +2 more
openaire   +1 more source

Two-Dimensional Evolutionary Spectrum Approach to Nonstationary Fading Channel Modeling

IEEE Transactions on Vehicular Technology, 2016
Zhengchuan Chen, Qing Wang, D. Wu, Pingyi Fan   +3 more
semanticscholar   +1 more source

Evolutionary spectrum inversion and analysis (Especia)

, 2016
Quast Ralf
semanticscholar   +1 more source