基于IEEE 802.15.4a信道的超宽带脉冲信号仿真研究

针对超宽带通信技术在远距离、低速率、精确定位方面的应用,对超宽带脉冲信号波形设计和特性进行了研究。采用了优化组合的方法进行了超宽带脉冲信号设计并对其性能进行了研究。通过仿真计算,分析了超宽带脉冲信号在IEEE 802.15.4a信道中的传播特性,得出了信道对脉冲信号影响的相关结论。结果表明,采用优化组合方法设计的超宽带脉冲信号能满足FCC辐射掩蔽标准要求,IEEE802.15.4a信道模型能较好的反映信号传播的基本规律,多路径信道对超宽带信号功率谱影响不大,超宽脉冲带信号具有抗多径干扰能力强的特点,适合低速率无线个域网、精确定位等领域的应用。

Simulation Study on UWB Pulse Signal Based on IEEE 802.15.4a Channel

For the application of Ultra Wide Band(UWB) in the long-distance,low data-rate and accurate localization field,the design method and the characteristics of UWB pulse signal were investigated.By the optimization combined method,the UWB pulses were designed and its properties were studied.Through the computer simulation,the UWB signal’s transmitting characteristics on IEEE 802.15.4a channel were analyzed and the channel influences were given.The results show that the UWB pulse signal designed by optimization combined method satisfies the Federal Communication Commission(FCC) standard requirement and the IEEE 802.15.4a channel model is suitable to the investigation of the UWB system.It also shows that the power spectrum density(PSD) of the UWB signal is not deteriorated by the multi-path channel.The UWB pulse signal performs better in anti-multipath interference and is applicable in the field of low data-rate Wireless Personal Area Network(WPAN) and accurate localization.