摘要
功率谱估计是一种重要的频谱分析方法,通过分析比较MATLAB中几种常见的功率谱估计函数,从而选择最佳的频谱估计函数,减小实际的信号频谱分析误差。设计了仿真信号,并采用MATLAB中几种功率谱估计函数进行频谱估计;从频谱图出发,比较分析了谱估计结果,指出函数pwelch计算的功率谱估计在从宽带噪声中检测窄带信号应用过程中效果最好,对信号的频谱分析具有实际的应用价值。
The power spectrum estimation is an important method for spectrum analysis. In this paper, several functions for power spectrum estimation in MATLAB are analyzed to choose the best function in order to reduce the error of signal spectrum analysis. A simulationl signal is de- signed and the power spectrum is estimated using these functions. Based on the comparison of the estimated results, it is found that the function pwelch is the best of them on choosing the signal source from broadband noises, and it is valuable for signal spectrum analysis.
出处
《电子产品可靠性与环境试验》
2009年第6期28-31,共4页
Electronic Product Reliability and Environmental Testing
