Introduction(绪论) 信号:携带信息的任何物理量,用以传送和交换信息、 A signal is defined as any physical quantity that carries information 例:心电信号、脑电信号、振动信号、利率、股票行情 等Introduction(绪论) 信号：携带信息的任何物理量，用以传送和交换信息 A signal is defined as any physical quantity that carries information. 例：心电信号、脑电信号、振动信号、利率、股票行情 等