A novel algorithm for peak-to-average power ratio reduction in FBMC-OQAM system

2017 IEEE 17th International Conference on Communication Technology (ICCT) Pub Date : 2017-10-01 DOI:10.1109/ICCT.2017.8359605

Zongmiao He, Lingyun Zhou, Yiou Chen, X. Ling

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Abstract

As an alternative waveforms of the fifth generation mobile communication system (5G), filter bank multicarrier with offset quadrature amplitude modulation (FBMC-OQAM) is a powerful signal processing method that allows data transmission with a maximum bandwidth efficiency, but it still has a high peak-to-average power ratio (PAPR). In this paper, a novel algorithm for PAPR reduction is proposed by analyzing the essential cause of PAPR produced in FBMC-OQAM system. The proposed algorithm is divided into two parts: Hadamard Transform (HT) and randomly assigning prototype filters (RAPF). The essence of FBMC-OQAM system with high PAPR has two reasons: the first one is affected by the aperiodic correlation of send signals, which can be improved by HT; the second one is affected by consistent phase-frequency characteristic, and it can be improved through RAPF. Different prototype filters are randomly assigned to subcarriers in order to adjust the phase congruency. Theoretical analysis and simulation results show that the PAPR of FBMC-OQAM system can be reduced significantly by this algorithm.

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FBMC-OQAM系统中降低峰均功率比的新算法

滤波组多载波偏移正交调幅(fbpm - oqam)作为第五代移动通信系统(5G)的备选波形，是一种功能强大的信号处理方法，可以实现最大带宽效率的数据传输，但仍具有较高的峰均功率比(PAPR)。本文通过分析FBMC-OQAM系统产生PAPR的根本原因，提出了一种新的减少PAPR的算法。该算法分为两部分:Hadamard变换(HT)和随机分配原型滤波器(RAPF)。高PAPR的FBMC-OQAM系统本质上有两个原因:一是受发送信号非周期相关的影响，可以通过HT来改善;二是受相频一致特性的影响，可通过RAPF加以改善。为了调整相位一致性，将不同的原型滤波器随机分配给子载波。理论分析和仿真结果表明，该算法能显著降低FBMC-OQAM系统的PAPR。

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2017 IEEE 17th International Conference on Communication Technology (ICCT)

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