Carrier signal: A standard, predictable signal, such as a sine wave, used to transmit data. The unaltered signal indicates an absence Of data; alterations in the standard pattern convey meaning.

• 载波信号:一个标准的可预知的用来传输数据的信号,如正弦波。不变化的信号表示无数据,以标准波形变化的信号表示有数据。