峰值到平均功率降低使用预编码与剪辑和滤波

M. Islam
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引用次数: 1

摘要

第三代合作伙伴计划长期演进(3GPP LTE)采用正交频分多址(OFDMA)作为下行链路,单载波频分多址(SC-FDMA)作为上行链路。上行链路采用SC-FDMA,其峰值平均功率比(PAPR)低。为了降低OFDMA中的PAPR,文献中使用了几种技术。3GPP采用SC-FDMA,因为它比OFDMA具有更好的PAPR特性。关于SC-FDMA中不同参数对PAPR的影响的研究仍在继续。本文提出了一种减少PAPR的技术,在第一步进行预编码,在第二步使用SC-FDMA环境进行裁剪。结果表明,随着夹片数量的增加,PAPR减小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Peak to average power reduction using precoding with clipping and filtering
3rd Generation Partnership Project Long Term Evolution (3GPP LTE) has adopted orthogonal frequency division multiple access (OFDMA) as downlink and single carrier frequency division multiple access (SC-FDMA) as uplink for multiple access scheme. SC-FDMA is adopted in uplink due to its low peak to average power ratio (PAPR). To reduce PAPR in OFDMA, several techniques are used in literature. SC-FDMA is adopted in 3GPP as it shows better PAPR characteristics than OFDMA. Many researches are still going on to find the impact of different parameters on PAPR in SC-FDMA. In this paper, a PAPR reduction technique is proposed where the precoding is done in the first step and at the second step, clipping is performed using SC-FDMA environment. Result shows that the PAPR is reduced at the increase in number of clips.
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