Results 171 to 180 of about 199,290 (215)

Fatigue Life Analysis of Frame Based on Measured Load Spectrum

Lecture Notes in Electrical Engineering, 2022
Ning Yu
exaly   +2 more sources

Smooth Affine Model for the Framed Correspondences Spectrum

Journal of Mathematical Sciences, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Ambiguities in the deduction of rest frame fluctuation spectrums from spectrums computed in moving frames

Journal of Geophysical Research, 1976
The problem of interpretation of power spectrums computed by Fourier analysis of data time series taken in frames moving with respect to the medium containing the fluctuations is examined. It is found that no unique connection exists between the rest frame power spectrum as a function of scale length and the derived power spectrum as a function ...
R. W. Fredricks, F. V. Coroniti
openaire   +1 more source

Optimization of Cooperative Spectrum Sensing with Parallel Frame Structure

Wireless Personal Communications, 2015
In cognitive radio (CR) networks, cooperative spectrum sensing (CSS) can greatly improve the sensing performance. In this paper, we propose a parallel frame structure for CSS in which spectrum sensing and data transmission are conducted concurrently over two different parts of the primary user (PU) spectrum band.
Hang Hu 0001, Hang Zhang 0001, Yi Chen
openaire   +1 more source

Optimization of MAC Frame Structure for Opportunistic Spectrum Access

IEEE Transactions on Wireless Communications, 2012
Sensing-throughput tradeoff is involved in opportunistic spectrum access (OSA). At the physical layer it's expressed as the tradeoff between false alarm and misdetection, while at the MAC layer it's between maximizing the throughput of secondary users and reducing collisions with primary users. To balance both tradeoffs together drives the optimization
Jing Zhang 0031, Lina Qi, Hongbo Zhu 0002   +2 more
openaire   +1 more source

Study of overlapping frames spectrum analysis in real-time spectrum analyzer

2011 International Conference on Computational Problem-Solving (ICCP), 2011
In this paper, the basic theory of overlapping frames spectrum analysis is introduced, and the criteria of overlap factor selection is discussed in detail. Further, the design scheme of overlapping frames spectrum analysis is proposed. The design scheme is successfully implemented by Field Programmable Gate Array (FPGA) in the real-time spectrum ...
Ming Jiancheng, Yan Xiao, Qin Kaiyu
openaire   +1 more source

A Spectrum Sensing Algorithm for DTMB-A based on Accumulated Autocorrelation of Multiple Frames

2021 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2021
As for the advanced version of digital terrestrial television multimedia broadcasting (DTMB-A), requirements of real-time spectrum sensing algorithms are demanded in effectiveness and robustness for the diverse applications. In this article, an algorithm is proposed as different interval Pseudo-Noise Auto-correlation (DIPNAC) to detect the DTMB-A ...
Yunchuan Huang, Chao Zhang 0009, Changyong Pan   +2 more
openaire   +1 more source

Vibration environment spectrum investigation of metro bogie frame end

Engineering Failure Analysis
Suqin Wang, Tingting Wu, Peijiang Liu
exaly   +2 more sources

Throughput of an opportunistic spectrum access scheme under a frame structure

2016 Eighth International Conference on Ubiquitous and Future Networks (ICUFN), 2016
One of the approaches in cognitive radio is the opportunistic spectrum access (OSA), which enables secondary users (SUs) to access the licensed frequency bands that are detected to be idle. Though there have been a few updates on the throughput aspects of SUs in OSA not much work has been done taking into account the sensing errors, spectrum occupancy ...
Jagadeeshchandra Shetty, H. S. Jamadagni
openaire   +1 more source

Constructing Finite Frames with a Given Spectrum

2013
Broadly speaking, frame theory is the study of how to produce well-conditioned frame operators, often subject to nonlinear application-motivated restrictions on the frame vectors themselves. In this chapter, we focus on one particularly well-studied type of restriction: having frame vectors of prescribed lengths.
Matthew Fickus, Dustin G. Mixon, Miriam J. Poteet   +2 more
openaire   +1 more source