If the length of its cyclic prefix is larger than the delay spread of transmission channel, we can get a simplefrequency equalizer to demodulate OFDM signal.
The real time phase detector is constructed with a simple circuits. The amplitude and frequency of the vibrations are measured by synchronously detecting the phases in interference signal.
利用简单的电路构成实时相位检测器,对干涉信号中的相位信号进行同步检测,最终获得实际振动的振幅频率。
3
Filtering signal in the wavelet domain, by the frequency components acceptable for ear from the original speech, is a simple and effective speech denoising method.