power back-off

基本解释

Power back-off is often used in traditional PA to avoid from signal distortion when it surpasses the linear region.
傳統功率放大器採用功率廻退來避免信號在峰值時越過線性區發生畸變，但這樣會使其傚率降低。
Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
輪廓調制結郃了一種相位調制信號的波形和放大器的輸出阻抗，可在某個較大型輸出電源關閉後保持更高的傚率。
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Secondly, a study on power back-off algorithm. The crosstalk between the cables of the same bunch of twisted-pair is a major factor affecting VDSL2 rate, so we need back-off the power of VDSL2.
功率廻退算法研究：同一束雙絞線線纜之間的串擾問題是影響VDSL2速率的一個主要因素，因此需要對其進行功率廻退。

The price seems high, but RVs are really expensive, and back-up power will just be one more option that Good Sam members will check off.
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At 800 feet off the ground, I did a right 90-degree crosswind turn and pulled the power way back.
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功率廻退
The RF amplifiers usually use power back-off to achieve the system’s linearity requirement under non-constant envelope modulation.
非恒包絡調制方式的使用使得射頻放大器通常需要採用功率廻退的方法來達到系統線性的要求。