| 摘要:超宽带技术适合无线传感器网络大流量媒体信息的采集和传输，同时具有功耗低、兼容性和适应能力强的优势，但OFDM调制技术却给系统带来较高的峰均功率比。一种利用乃奎斯特成型脉冲反转双曲正切方法，将原始数据与成型矩阵进行求积，增加子载波的符号间的相关性，可减少信噪比和峰均功率比。通过多载波系统设计和CCDF及BER等主要指标的对比，该方法可行，并能带来降低4dB的效果。 |
| 关键词: 无线传感器网络 OFDM 多载波 PAPR 反转双曲正切脉冲 |
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| A method of reducing the PAPR of wireless sensor network based on OFDM |
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| Abstract:The ultra wide band technology was suitable for flow media information collection and transmission in wireless sensor network, it had advantages of low power consumption, compatibility and the advantage of A strong ability to adapt to different systems. But the modulation technology of OFDM had brought high peak to average power ratio to system. There was a Nyquist pulse shaping technology based on FARCSECH to reduce the PAPR formed matrix quadrature with the original data and increased the correlation between subcarrier symbols. By building different multi-carrier systems and the comparisons of their CCDF and BER shown that this method was feasible and had a falling effect of 4dB |
| Key words: Wireless Sensor Networks (WSNs) Orthogonal Frequency Division Multiplexing Multi-carrier Peak-to-average power ratio FARCSECH Pulse |