为降低正交频分复用OFDM的峰均比(PAPR)提出了改进的蜂窝扩展星座图的方法。改进的算法采用音调注入技术(TI),在不增加信号功率的约束条件下,动态地向外扩展传输数据的星座点,从而降低OFDM信号的峰均功率比。该方法在接收机端不需要任何的处理过程,而且没有边带信息。改进的蜂窝星座图扩展方法经仿真能够取得的峰均功率比比64-QAM约低4dB,降低效果显著。
In order to reduce the peak-to-average power ratio of orthogonal frequency division multiplexing (OFDM) systems, this paper presents a method of using an improved honeycomb planisphere. The improved algorithm adopts TI technology, and dynamically extends the constellation points without increasing the power of signals. This method does not need any processing at the receiver and requires no side information. The improved honeycomb planisphere extension achieves about 4dB lower compared with the 64 - QAM planisphere extension.