基于脉冲成型的降低FBMC系统峰均比方法

针对滤波器组多载波（FBMC：Filter Bank MultiCarrier）系统峰均比（PAPR：Peak to Average Power Ra-tion）较高的问题,基于FBMC系统中原型滤波器及其多项结构,借鉴正交频分复用（OFDM：Orthogonal Fre-quency Division Multiplexing）降低峰均比方法,提出一种基于脉冲成型（PS：Pulse Shaping）技术的降低FB-MC系统峰均比的方法。该方法在综合滤波器S/P（Serial to Parallel）后添加频率加权,实现了时域的循环位移,从而达到降低峰均比的目的。仿真结果表明,在FBMC系统中引入PS技术后,峰均比有明显下降。

Solution to Peak-to-Average Power Ration in FBMC Based on Pulse Shaping

In order to solve the high PAPR（Peak to Average Power Ration） problem in FBMC（Filter Bank MmultiCarrier） system,based on the prototype filter and its polyphase structure in FBMC system,a solution is proposed to reduce PAPR in FBMC system using pulse shaping technique,which borrows ideas from solutions to reduce PAPR in OFDM（Orthogonal Frequency Division Multiplexing） system.The cyclic shifting is implemented in time-domain by adding weighting in frequency-domain after S/P（Serial to Parallel） in synthesis filer banks,thereby the reduction of PAPR is accomplished.The simulation results indicate that PAPR is obviously reduced after importing PS in FBMC system.