【作者】 王良红； 张冬玲； 王锦玲；

【Author】 WangLiangHong~1, zhangdongling~1, Wangjinling~2 (Institute of Information Technology, Information Engineering University of PLA, Zhengzhou 450002, China) (Department of System Science & mathematics, Zhengzhou University, Zhengzhou 450052, China)

【机构】 解放军信息工程大学信息工程学院； 郑州大学；

【摘要】 对信号的分析和处理离不开频谱分析,用DFT或其快速算法FFT是实现信号频谱分析的重要手段之一。用DFT实现连续信号的频谱分析主要用采样频率的整数倍逼近连续信号的频谱,存在误差。文中根据DFT与CFT的关系式,具体分析了不同频率的连续时间信号的频率和复振幅的计算方法。更多还原

【Abstract】 Spectrum analysis is necessary in signal analysis and processing. DFT and FFF is one of the most important methods in signal spectrum analysis. Since the values of DFT at the N integer times component is used to approach the value of CFT at the N integer frequency, the result is usually approximate. In this paper, based on the expression of DFT and CFT, a method is proposed for precisely estimating the spectrum of the continuous time signal in the different frequency.更多还原