The ratio of peak and average power in multicarrier system is much larger than that in single carrier system, and may grow unboundedly as the number of subcarriers grows to infinity.
多载波信号的峰值平均功率比远远大于单载波系统，而且峰平比随着子载波个数无限增长。
2
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
3
The cross-term interference caused by multi-modulator and multi-carrier makes it difficult the use of the cyclic autocorrelation demodulation.