signal modulation

例句：

1. 1. The signal modulation is crucial for the communication system.
   信号调制对于通信系统至关重要。
2. 2. In wireless communication, signal modulation is used to convert electrical signals into radio waves.
   在无线通信中，信号调制用于将电信号转换为无线电波。
3. 3. The engineers are responsible for designing and implementing signal modulation algorithms.
   工程师们负责设计和实施信号调制算法。