摘要: |
通过研究利用星座扩展降低OFDM中峰均功率比(PAPR)的方法,提出了一种寻找次最
优映射向量的新方法——联合搜索(JS)算法。该算法联合相邻的若干子载波,通过比较局部
的峰值大小
搜索次最优映射向量。仿真结果表明,JS算法在降低计算复杂度、提高PAPR抑制增益以及增
强应用灵活性等方面都有明显改进。 |
关键词: 正交频分复用 峰均功率比 星座扩展 联合搜索算法 |
DOI: |
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基金项目: |
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A New PAPR Reduction Method via Constellation Extension for OFDM |
YIN Zhi-wei,WAN Yi |
(School of Information Science and Engineering, Lanzhou University, Lanzhou 7300
00,China) |
Abstract: |
Through investigating the PAPR(PeaktoAverage Power Ratio) reduction method
via constellation extension,
a new method is proposed to find a suboptimal constellation mapping solution,t
he joint searching (JS) algorithm. The method searches the suboptimal mapping by
combining several adjacent subcarriers and comparing the local peak value. Sim
ulation results show that JS method performs better in the aspects of computatio
na
l complexity, PAPR suppression performance and application flexibility. |
Key words: OFDM PAPR constellation extension joint searching algorithm |