组合正弦脉冲成型降低OFDM峰均比

Combined Sine Pulse Shaping for PAPR Reduction of OFDM Signal

低轨卫星宽带通信采用OFDM技术,不仅能有效提升频谱效率,还利于与地面5G融合,对构建6G具有深远的意义。脉冲成型技术是一种能够有效降低OFDM(Orthogonal Frequency Division Multiplexing)信号高峰均比(Peak to Average Power Ratio,PAPR)的方法,然而,不同的脉冲成型抑制峰均比的性能不同。提出了一种由线性函数和正弦函数线性组成的改进脉冲成型技术。仿真结果表明,提出的改进脉冲成型技术较传统的脉冲成型技术更能有效降低OFDM信号高的峰均比。

The low-orbit satellite broadband communication adopts OFDM technology,which not only can effectively improves the spectrum efficiency,but also facilitates the integration with the ground 5G,which has far-reaching significance for the construction of 6G global seamless network.The pulse shaping technique is an effective and flexible way for reducing PAPR(peak-to-average power ratio)of OFDM(orthogonal frequency division multiplexing)signals.However,different pulse shaping has different performance in suppressing PAPR.This paper proposes an improved pulse shaping technique,which is a linear combination between linear function and sine function.The simulation results show that the proposed pulse shaping technique can get better performance in reducing the PAPR as compared to conventional pulse shaping methods.