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arXiv 1105.1745cs.ITmath.IT
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OFDM传输中PAPR问题的备选方案分析

Analysis of Alternative Metrics for the PAPR Problem in OFDM Transmission

Gerhard Wunder

摘要:

传输信号的有效峰均比是衡量OFDM传输中非线性失真影响的标准指标。一个常见的经验法则是对数$(N)$屏障,其中$N$是已经被许多作者理论上分析的子载波的数量。最近,新的替代指标已被提出在实践中可能导致不同的系统设计规则,本文进行了理论分析。主要发现之一是,最令人惊讶的是,对数$(N)$势垒变得过于保守:例如,对于所谓的面向量化器的度量,缩放是相当$\log[ \log(N)]$。为了证明这一结果,新的上界编码系统的PAPR分布,以及一个定理PAPR的结果,这些替代的度量。

英文摘要:

The effective PAPR of the transmit signal is the standard metric to capture the effect of nonlinear distortion in OFDM transmission. A common rule of thumb is the log$(N)$ barrier where $N$ is the number of subcarriers which has been theoretically analyzed by many authors. Recently, new alternative metrics have been proposed in practice leading potentially to different system design rules which are theoretically analyzed in this paper. One of the main findings is that, most surprisingly, the log$(N)$ barrier turns out to be much too conservative: e.g. for the so-called amplifier-oriented metric the scaling is rather $\log[ \log(N)]$. To prove this result, new upper bounds on the PAPR distribution for coded systems are presented as well as a theorem relating PAPR results to these alternative metrics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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