Reduction of peak-to-average power ratio of OFDM system using a companding technique
Reduction of peak-to-average power ratio of OFDM system using a companding technique
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DOI：
10.1109/11.796272
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发表时间：
1999-09
期刊：
影响因子：
--
通讯作者：
Xianbin Wang;T. Tjhung;C. Ng
中科院分区：
文献类型：
--
作者：
Xianbin Wang;T. Tjhung;C. Ng
本文提出了一种降低正交频分复用（OFDM）信号的峰均功率比的扩宽技术。确定了OFDM信号幅值的概率密度函数。由于OFDM信号的高斯分布特性，使得放大技术非常有效，因为大的OFDM信号很少出现。本文确定了OFDM系统的峰均功率比和最优扩展系数。导出了压缩后系统的符号错误率。并对扩压前后系统的性能进行了比较。
A companding technique is proposed to reduce the peak-to-average-power ratio of the orthogonal frequency division multiplexing (OFDM) signal in this paper. The probability density function of the amplitude of the OFDM signal is determined. Because of the Gaussian distribution of the OFDM signal, the companding technique can be quite effective, since a large OFDM signal only occurs infrequently. The peak-to-average power ratio of an OFDM system and the optimal companding coefficient are determined in this paper. The symbol error rate of the systems after the companding is derived. The performances of the system with and without the companding are also compared.