# 频谱

## 參考

1. ^ Alexander, Charles; Sadiku, Matthew. Fundamentals of Electric Circuits Second. McGraw-Hill. 2004. 761. ISBN 0-07-249350-X. "The frequency spectrum of a signal consists of the plots of the amplitudes and phases of the harmonics versus frequency."
2. ^ 徐科军. 信号分析与处理. 清华大学出版社. 2006. 27. ISBN 7302120927.