| 摘要: |
| 为降低正交频分复用(OFDM)系统中发射信号的峰值功率,提出了在一个OFDM符号内使用两种信号星座图对二进制数据进行编码,通过在各个子载波处选用合理的信号星座图来实现对峰值均值功率比(PAPR)的抑制。由于算法不改变现有OFDM系统的实现结构,在不影响OFDM中其它信号处理性能的条件下,仿真表明算法能有效地降低系统的峰值均值功率比。 |
| 关键词: 正交频分复用,峰值均值功率比,信号星座图 |
| DOI：10.3969/j.issn.1001-893X. |
| 修订日期：2007-10-29 |
| 基金项目:国家自然科学基金 |
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| A PAPR Reduction Method for OFDM Systems |
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| Abstract: |
| In order to reduce the peak power of radio signal in the orthogonal frequency division multiplexing(OFDM) systems,two constellations are used to modulate the binary data within an OFDM symbol.The peak-to-average power ratio(PAPR) of OFDM signal can be reduced by a reasonable arrangement of the two constellations among the subcarriers.The realization of the modulation scheme requires no structural change in current OFDM systems and has almost no effect on the other processing performance in OFDM systems.The computer simulation demonstrates that the proposed algorithm can obviously improve the PAPR performance of OFDM symbols. |
| Key words: OFDM,peak-to-average power ratio(PAPR),signal constellation |
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