modulation demodulation的用法和樣例：
例句
- In recent years, new modulation techniques supported by other technological advances have helped BPL evolve.
近年來，新調製解調技術的進步幫助了電力線寬頻網路的發展。 - The main purpose is to study further in the constant envelope and Quasi-constant envelope modulations with high modulation efficiency.
主要研究適合深空通道傳輸的具有恆定或准恆定包絡的高效數字調製方式與直接序列擴頻相結合的組合調製解調方式。
