特征(语言学)
计算机科学
信号处理
频域
能量(信号处理)
信号(编程语言)
时频分析
代表(政治)
人工智能
时域
领域(数学分析)
模式识别(心理学)
机器学习
数据挖掘
数字信号处理
数学
统计
电信
计算机硬件
数学分析
哲学
政治
语言学
程序设计语言
法学
雷达
计算机视觉
政治学
作者
Ervin Sejdić,Igor Djurović,Jin Jiang
标识
DOI:10.1016/j.dsp.2007.12.004
摘要
Signal processing can be found in many applications and its primary goal is to provide underlying information on specific problems for the purpose of decision making. Traditional signal processing approaches assume the stationarity of signals, which in practice is not often satisfied. Hence, time or frequency descriptions alone are insufficient to provide comprehensive information about such signals. On the contrary, time–frequency analysis is more suitable for nonstationary signals. Therefore, this paper provides a status report of feature based signal processing in the time–frequency domain through an overview of recent contributions. The feature considered here is energy concentration. The paper provides an analysis of several classes of feature extractors, i.e., time–frequency representations, and feature classifiers. The results of the literature review indicate that time–frequency domain signal processing using energy concentration as a feature is a very powerful tool and has been utilized in numerous applications. The expectation is that further research and applications of these algorithms will flourish in the near future.
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