Analysis of Tone Reservation Method for WiMAX System
Analysis of Tone Reservation Method for WiMAX System
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DOI：
10.1109/iscit.2006.339999
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
Su Hu;Gang Wu;Y. Guan;C. Law;Shaoqian Li
中科院分区：
文献类型：
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作者：
Su Hu;Gang Wu;Y. Guan;C. Law;Shaoqian Li
对于WiMAX系统，音调预留方法为降低峰均功率比（PAPR）提供了较好的解决方案。通过平衡基带复信号的峰值幅度和其他离散符号，为多个带内空子载波分配设计的复值用于音调预留。本文通过对峰均比降低增益的分析，证明了通过音调预留方法可以显著降低WiMAX系统的峰均比。此外，最坏情况下的情况下进行了分析的音调保留和搜索方法的最低限度的PARP减少扩展。仿真结果还表明，峰值和第二峰值幅度之间的不同间隙影响音调保留的效率。该算法为发射机是否使用音调预留提供了一种有效的方法。在IEEE802.16 -2004无线OFDM物理层模型下，在最坏情况下，采用音调预留方法，峰均比最大降低增益可达6.02dB，平均峰均比降低1.47dB
For WiMAX system, the tone reservation method provide a better solution to reduce peak-to-average power ratio (PAPR). Several in-band null subcarriers are allocated with designed complex value for tone reservation by balancing the peak amplitude of baseband complex signals and other discrete symbols. In this paper, analysis of PAPR reduction gain is given to prove that PAPR of WiMAX system can be significantly reduced through the tone reservation method. Furthermore, the worst-case scenario is analyzed for tone reservation and the searching method for lowest bound for PARP reduction is extended. Simulation results also demonstrate that the different gap between the peak and the second peak amplitude affects the efficiency of tone reservation. And our proposed calculation method provides a effective way to decide whether the transmitter should use tone reservation. Under the IEEE 802.16-2004 wireless OFDM physical layer model, in the worst-case, the highest PAPR reduction gain can approach 6.02 dB and the average PAPR reduction to 1.47 dB by tone reservation method