Single carrier frequency division multiple access (SC-FDMA) technique is one of the most important technology used in communication systems. One of the main drawbacks of SC-FDMA systems is the high peak-to-average power ratio (PAPR) of the transmitted signal. To transmit signal with high PAPR requires an actual and large linear domain of the power amplifier (PA). In this work, a new partial windowing technique is suggested for further reducing the PAPR in both localized FDMA (LFDMA) and distributed FDMA (DFDMA) systems. The suggested method improves a PAPR reduction method of SC-FDMA depending on the Lonzo’s resampling technique. To reach an appropriate tradeoff between the complexity of system performances and PAPR reduction, some MATLAB simulations by comparison between the effect of conventional SC-FDMA and proposed windowing technique have been evaluated and analyzed. The simulation results show best performance of the proposed scheme as compared to competitive substitutes. The acquired results show that when number of sub-carriers set as 1024, the PAPR exceeds 9.8 dB accounts for only 0.1% of transmitted signals when using DFDMA, approximately. But when the proposed method set up, the PAPR exceeds 7.8 dB accounts for almost 0.1% of transmitted signals. In LFDMA the PAPR exceeds 9.5 dB accounts for only 0.1%, but when suggested technique applied, the PAPR exceeds 7.5 dB accounts for almost 0.1% of transmitted signals. It is feasible to achieve a gain of between 1 and 3 dB in terms of PAPR reduction depending on the suggested method. Furthermore, comparison with conventional technique in terms of PAPR shows that our technique is a good alternative that can be selected as a PAPR reduction technique for SC-FDMA in communication systems.

单载波频分多址（SC-FDMA）技术是通信系统中最重要的技术之一。SC-FDMA 系统的主要缺点之一是传输信号的峰均功率比 (PAPR) 较高。传输具有高 PAPR 的信号需要功率放大器 (PA) 的实际且大的线性域。在这项工作中，提出了一种新的部分加窗技术，以进一步降低局部 FDMA (LFDMA) 和分布式 FDMA (DFDMA) 系统中的 PAPR。建议的方法根据 Lonzo 的重采样技术改进了 SC-FDMA 的 PAPR 降低方法。为了在系统性能的复杂性和 PAPR 降低之间达到适当的权衡，通过比较传统 SC-FDMA 和建议的加窗技术的效果，一些 MATLAB 模拟已经被评估和分析。仿真结果表明，与竞争替代方案相比，所提出的方案具有最佳性能。得到的结果表明，当子载波数设置为1024时，超过9.8dB的PAPR仅占使用DFDMA时发射信号的0.1%左右。但是当提出的方法设置时，PAPR 超过 7.8 dB 几乎占传输信号的 0.1%。在 LFDMA 中，PAPR 超过 9.5 dB 仅占 0.1%，但是当应用建议的技术时，PAPR 超过 7.5 dB 几乎占传输信号的 0.1%。根据建议的方法，在 PAPR 降低方面实现 1 到 3 dB 之间的增益是可行的。此外，