demodulation by filter

例句：

1. 1.In the process of demodulation, the signal is separated from the noise.
   在解调过程中，信号与噪声被分离。
2. 2.The demodulator was designed to detect and decode signals in a noisy environment.
   解调器被设计用来检测和解码在嘈杂环境中的信号。
3. 3. The demodulator successfully restored the lost data after several attempts.
   解调器在几次尝试后成功地恢复了丢失的数据。