PRE-MOD：预调制
“PRE-MODulation”在专业领域，尤其是美国航空航天局（NASA）的相关文档和通信中，通常被缩写为“PRE-MOD”，以简化书写并提高使用效率。该术语的中文含义为“预调制”，广泛用于描述信号处理或系统调试前的预备调制过程。
PRE-MODulation的英文发音
例句
- 40 Gb / s simulation and 10 Gb / s experiment are performed using tunable clock or data-related signal as the phase pre-modulating signal. The eye opening and receiver sensitivity are improved and the dispersion tolerance is doubled when the phase pre-modulation is imposed on NRZ signals.
- 10Gb/s实验和40Gb/s仿真结果表明，采用时钟信号和数据相关信号对非归零码进行可调节的相位预调制(PRE-MOD)，可增加信号的眼图开启度和接收灵敏度，将系统的色散容限提高1倍左右。
- The main points are as follows : 1. A new method to improve dispersion tolerance by imposing phase pre-modulation on non-return-to-zero ( NRZ ) format is put forward in this dissertation.
- 取得以下主要研究成果：1、提出了一种对非归零码进行相位预调制(PRE-MOD)，提高系统色散容限的方法。
- This scheme relaxes the requirement of optical signal-to-noise ratio and dispersion management. It also benefits the NRZ system upgrade because the phase pre-modulation is easy to be employed and adjusted at the transmitter. 2.
- 该方法降低了系统对光信噪比和色散管理的要求，且由于相位预调制(PRE-MOD)在发射端进行，调节方便，实施简单，便于系统升级。
- The bit-synchronous phase pre-modulation imposed on non-return-to-zero ( NRZ ) signals at the transmitter can reshape the NRZ pulse to return-to-zero ( RZ ) waveform and hence improve the eye opening.
- 通过在发射端对非归零（NRZ）的光信号进行比特同步相位预调制(PRE-MOD)，使非归零码在传输过程中得到波形重整，演变为归零（RZ）的波形，从而提高眼图开启度。
- Phase pre-modulation is investigated to overcome the impacts of sensitivity reduction and chromatic dispersion in high-speed and long-distance fiber transmission systems.
- 利用相位预调制(PRE-MOD)技术解决高速长距离光纤传输系统中面临的接收灵敏度降低和色散容限问题。
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