The principal drawback of the OFDM systems is that the Peak-to-Average envelopepower Ratio (PAR) of its signals may be very high. A high PAR may cause many problems in system design.
OFDM的一个主要缺点是峰均功率比特别高，而高的峰均比会对系统的设计带来很多问题。
2
Wherefore real-time trace voltage flicker 'envelope and initial phase Angle proceed with possess important theory sense and practical meaning among power system.
因此对电力系统中的电压闪变的包络线与初相角进行实时跟踪就具有重要的理论意义和现实意义。
3
A handy form of protection many people use, including healers with trying patients, involves visualizing an envelope of white light (or any color you feel im parts power) around your entire body.