机构

• 金属研究所 [2]
• 长春光学精密机械与物... [1]
• 自动化研究所 [1]
• 云南天文台 [1]

采集方式

• OAI收割 [5]

内容类型

• 期刊论文 [4]
• 会议论文 [1]

发表日期

• 2025 [1]
• 2008 [3]
• 2005 [1]

学科主题

• 天文学 [1]
• 天文学::射电与天文... [1]

筛选

浏览/检索结果: 共5条，第1-5条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择作者升序作者降序发表日期升序发表日期降序题名升序题名降序提交时间升序提交时间降序 the Time and Frequency Distribution Characteristics of Interference Signals Based on Artificial Intelligence Technology 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE, 2025 作者:  Li, Shengyang;  Zhao, Zhixiang;  Tian, Bin;  Tang, Junwen;  Fu, Ning   |  收藏  |  浏览/下载：19/0  |  提交时间：2025/08/04 Radio astronomy  artificial intelligence  threshold algorithm  radio interference  time and frequency distribution   A high-accuracy parameter estimation algorithm for jointless Frequency-shift track circuit (EI CONFERENCE) 会议论文  OAI收割 ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China 作者:  Zheng X. 收藏  |  浏览/下载：53/0  |  提交时间：2013/03/25 FSK (Frequency Shift keying) signal  which has advantages of narrow-bandwidth  strong anti-interference ability  long transmission distance and so on  is used in jointless Frequency-shift track circuit to send different kinds of control signals. However  as FSK is non-linearly modulated  parameter estimation with high accuracy is hard to realize. Based on the spectrum analysis complement with time-frequency distribution  a highaccuracy FSK signal parameter estimation algorithm is put forward in this paper. According to the signal characteristics  under-sampling and ZFFT are used to improve the accuracy of spectrum analysis  and the base frequency resolution meets system requirement of 0.02Hz. Wigner-Ville distribution has an excellent time-frequency concentration while serious cross-term interference at the same time. Through the design of kernel function  the cross-terms are almost suppressed and the upper/down side frequency resolution meets the system requirement of 0.2Hz. The effectivities of all the methods mentioned above have been proved by MATLAB simulation  which pave a solid way for the development of high-accuracy FSK signal parameter estimation devices. 2008 IEEE.   TVAR Time-frequency Analysis for Non-stationary Vibration Signals of Spacecraft 期刊论文  OAI收割 CHINESE JOURNAL OF AERONAUTICS, 2008, 卷号: 21, 期号: 5, 页码: 423-432 作者:  Hai Yang;  Wei Cheng;  Hong Zhu   |  收藏  |  浏览/下载：19/0  |  提交时间：2021/02/02 non-stationary random vibration  time-frequency distribution  process neural network  empirical mode decomposition   TVAR Time-frequency Analysis for Non-stationary Vibration Signals of Spacecraft 期刊论文  OAI收割 CHINESE JOURNAL OF AERONAUTICS, 2008, 卷号: 21, 期号: 5, 页码: 423-432 作者:  Hai Yang;  Wei Cheng;  Hong Zhu   |  收藏  |  浏览/下载：38/0  |  提交时间：2021/02/02 non-stationary random vibration  time-frequency distribution  process neural network  empirical mode decomposition   Nonnegative time-frequency distributions for parametric time-frequency representations using semi-affine transformation group 期刊论文  OAI收割 SIGNAL PROCESSING, 2005, 卷号: 85, 期号: 9, 页码: 1813-1826 作者:  Zou, HX;  Wang, DJ;  Zhang, XD;  Li, YD 收藏  |  浏览/下载：43/0  |  提交时间：2015/11/06 nonnegative time-frequency distribution  Wigner-Ville distribution  FM(m)let transform  Dopplerlet transform  semi-affine transformation (SAT) group  instantaneous frequency  parametric atomic decomposition  matching pursuit