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首页> 外文期刊>Signal Processing, IET >Experimental validation of orthogonal frequency division multiplexing with peak-to-average power ratio reduction and out-band distortion control using software defined radio
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Experimental validation of orthogonal frequency division multiplexing with peak-to-average power ratio reduction and out-band distortion control using software defined radio

机译：利用峰均功率比降低和带外失真控制使用软件定义无线电进行正交频分复用的实验验证

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摘要

Orthogonal frequency division multiplexing (OFDM) is an emerging technology in recent wireless communication standards where high data rate is required at low latency and better spectral efficiency. OFDM signals have a generic problem of high peak-to-average power ratio (PAPR) due to the superimposition of the data-modulated subcarriers. This high peak signals may result in amplifier non-linearity which creates many problems such as performance degradation and out-of-band distortion. Hence, the authors addressed this problem by designing and implementing four new PAPR reduction schemes such as phase modulation, rail clipping, sample and hold approach and threshold methods based on amplitude clipping to reduce PAPR and improve the band gap between spectral sidelobes to main lobe significantly. For practical proof of the suggested concepts, they have chosen software-defined radio as an experimental setup in which universal software radio peripheral N210 employed as hardware and GNU radio as software. Experimental results are analysed in terms of significant PAPR reduction and out-of-band spectral leakage control. Besides these, motivation, background and relevant mathematical analysis with rigid justification are presented in this study.
机译：正交频分复用（OFDM）是近来无线通信标准中的一项新兴技术，在该标准中，要求高数据速率，低延迟和更好的频谱效率。由于数据调制子载波的叠加，OFDM信号具有高峰均功率比（PAPR）的一般问题。这种高峰值信号可能会导致放大器非线性，从而产生许多问题，例如性能下降和带外失真。因此，作者通过设计和实施四种新的PAPR降低方案（例如相位调制，轨限幅，采样和保持方法以及基于幅度限幅的阈值方法）来解决此问题，以降低PAPR并显着改善频谱旁瓣至主瓣之间的带隙。为了对建议的概念进行实际证明，他们选择了软件无线电作为实验装置，其中通用软件无线电外围设备N210被用作硬件，而GNU无线电被用作软件。根据显着降低的PAPR和带外频谱泄漏控制来分析实验结果。除此之外，本研究还提供了动机，背景和相关的具有正当理由的数学分析。

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