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无线传感器网络(WSNs)节点通常使用电池来供电,这成为限制其广泛应用的瓶颈.所以低功耗WSNs的设计成为人们研究的重点.WSNs的传输体制很大程度上决定了整个网络的能耗性能.本文中将频移键控调制(FSK)和开关频移键控调制(OOFSK)两种高效的传输方式引入WSNs,通过建立基本通信模型,推导他们的能耗性能指标及变化趋势.通过数值分析结果可知,在低信噪比、低OOFSK调制占空比等条件下,OOFSK传输具有明显的能耗优势.同时进一步分析得到OOFSK和FSK调制在WSNs中的应用场景,对低功耗WSNs的调制模式设计具有积极作用.
Therefore, the design of low-power WSNs has become the focus of research.WSNs transmission system largely determines the energy consumption of the entire network Performance.In this paper, two efficient transmission methods, FSK and OOFSK, are introduced into WSNs, and their energy consumption performance indexes and trends are derived through the establishment of basic communication models.Through Numerical analysis shows that OOFSK transmission has obvious energy consumption advantages under low signal-to-noise ratio and low duty cycle of OOFSK modulation.At the same time, the application scenarios of OOFSK and FSK modulation in WSNs are further analyzed, The modulation mode design has a positive effect.