面向载波聚合的FBMC系统PAPR抑制算法研究

针对面向载波聚合的滤波器组多载波(FBMC)调制系统PAPR过高问题,提出一种适用于面向载波聚合的FBMC系统降低PAPR的有效方法。基于预留子载波思想,利用分量载波间的保护间隔充当预留子载波成分,结合时域信号剪切的实现方法,降低信号峰均功率比。同时为克服FBMC系统符号重叠特性的影响,利用后向迭代的实现思想,避免符号重叠引发的峰值再生而引发峰均比回升的问题。仿真结果表明算法可以在不影响系统传输性能的情况下有效降低系统的峰均功率比。

Research on reducing PAPR in FBMC system with carrier aggregation

Confronted with the high PAPR (Peak to Average Power Ratio) problem in FBMC ( Filter Bank Multicarrier) system with carrier aggregation, this paper presents an effective method to reduce PAPR of this system. Rather than apply the valid data subcarriers traditionally, the guard band (GB) subcarriers between component carriers (CC) is utilized as the reserved subcarriers based on tone reservation (TR), and clipping method is also taken to reduce PAPR in this method. In order to overcome the overlapping of symbols in this system, backward superimposition process is also used in this method against the regrowth of peak value. Simulation results show that the method can effectively improves the PAPR performance without affecting the transmission performance.