| 术语 | pulse amplitude modulation (PAM) |
| 释义 | pulse amplitude modulation (PAM) 脉(冲振)幅调制(法，技术);［脉幅调变］ 1. In communications, a method of pulse modulation in which the amplitude of a train of pulses is adjusted in accordance with the input signal. 在通信技术中,脉冲调制的一种方法,脉冲串的幅度随输入信号的变化而变化。 参阅pulse modulation。 2. The coding of a continuous or analog signal onto a uniformlyspaced sequence of constantwidth pulses by amplitudemodulating the intensity of each pulse, i.e., similar to AM radio broadcasts except that the carrier is a pulse and not a sine wave. 一种把连续信号或模拟信号编码成一间隔均匀、宽度恒定的脉冲序列的方法, 其中采用的是对每个脉冲的强度进行幅值调制,即类似于调幅无线电广播的技术, 不同在于脉幅调制采用的载波不是正弦波,而是脉冲。 3. A modulation technique in which the amplitude of each pulse is related to the amplitude of an analog signal. Used, for example, in timedivision multiplex arrangements in which successive pulse represent samples from the individual voice band channels; also used in timedivision switching systems of small and moderate size. 各个脉冲的幅度同一个模拟信号的幅度相关联的调制技术。它可用在分时多路配置中, 由一连串的脉冲表示各路音频信道的采样,也可用在中小型的分时交换系统中。 |
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