By the debugging, the coding of speech is realized; m sequence is produced. Moreover, the spread of signal frequency spectrum is realized.

通过调试实现了语音的编码、产生了m序列，并实现了信号频谱的扩展。

youdao

Signal sequence DFT is a signal frequency spectrum sampling sets, therefore DFT can be directly used for analysis of signals frequency spectrum.

信号序列的DFT本身就是信号频谱的采样集，所以DFT可直接用于分析信号的频谱。

youdao

MethodsAnalyze spectrum of the sample signal and propose the formula of common sample frequency in low speed.

方法分析了带通采样信号的频谱和规律，导出了低速采样频率的选取公式。

youdao

Furthermore, the LightSpeaker's 2.5-inch wide dispersion driver uses digital signal processing to optimize high- and low-frequency output for a full spectrum of sound.

ENGADGET: Klipsch LightSpeaker makes whole home audio as simple as screwing in a light bulb (hands-on)