narrow frequency modulation

例句：

1. 1. In the digital communication system, narrowband frequency modulation is widelyused for data transmission.
   在数字通信系统中，窄带调频调制被广泛用于数据传输。
2. 2.The narrowband frequency modulation technique iseffective in reducing interference and improving signal quality.
   窄带调频调制技术能有效降低干扰并提高信号质量。
3. 3. The narrowband frequency modulation systemhas been applied to various wirelesscommunication systems.
   窄带调频调制系统已被应用于各种无线通信系统中。