PCE algorithm for PAPR reduction in OFDM-ROF system
PCE algorithm for PAPR reduction in OFDM-ROF system
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DOI：
10.1109/tce.2009.5277959
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发表时间：
2009-08
影响因子：
4.3
通讯作者：
Jianping Wang;Bosheng Liu;Xianwei Zhou
中科院分区：
文献类型：
--
作者：
Jianping Wang;Bosheng Liu;Xianwei Zhou
针对正交频分复用（OFDM）系统中峰均功率比（PAPR）降低问题，提出了一种新的星座扩展算法--峰值受限星座扩展（PCE）。该算法主动选择对信号峰值有贡献的星座外点，并动态改变这些点的幅值以降低峰均比。它不需要向接收机发送任何边信息，并且没有数据速率的损失。光纤无线电（ROF）网络被证明是无线接入技术的最佳解决方案之一，该算法在OFDM-ROF系统中得到了验证。仿真结果表明，该算法能有效地降低OFDM信号的峰均比。最后，对采用该算法前后的系统性能进行了比较.
In this paper, a novel constellation extension algorithm, named as peak-restricted constellation extension (PCE), is proposed for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) system. This algorithm actively selects outer constellation points which contribute to the large peak magnitudes, and dynamically alter the amplitudes of these points to reduce PAPR. It does not require transmitting any side information to the receiver and there is no loss in data rate. As radio-over-fiber (ROF) network is proved to be one of the best solutions for the wireless-access technology, this algorithm is verified in an OFDM-ROF system. It is shown that this algorithm significantly reduces the PAPR of OFDM signals. The performances of the system with and without the algorithm are also compared.