一种无线传感器网络调制方式的仿真和研究  

The Simulation and Research of a Wireless Sensor Network's Modulation

作　　者：程菊花[1] 陈友荣[1] 

机构地区：[1]浙江树人大学信息科技学院,杭州浙江310015

出　　处：《计算机仿真》2008年第2期162-166,共5页Computer Simulation

基　　金：浙江自然科学基金项目(Y105346);浙江树人大学校基金项目(2007A21005)

摘　　要：当前,存在着蓝牙、无线局域网等无线标准,它们的功耗相对比较高,成本高,不适用于低能耗的应用,如无线传感器网络。新的无线传感器网络调制方法——基于超宽带信号的多频带OFDM调制方法,可以有效的降低无线传感器网络的能耗。通过Matlab工具仿真了多频带OFDM调制信号和功率谱密度。比较当前无线标准,分析了频段间不干扰性和多频带OFDM调制功率,并提出了自适应子频带选择算法。通过仿真和分析,可以得出OFDM调制功耗低,能提供良好鲁棒干扰与共存性,能适应多种不同的环境。基于超宽带信号的多频带OFDM调制是一种集成到WSM中的,并能代替传统的无线电收发机的比较划算方法,具有一定的应用前景。There are many wireless standards such as Bluetooth and WLAN, but they are not suitable for low power consumption applications such as WSN. A new wireless sensor network＇s modulation, the multi-band OFDM modulation based on ultra wideband signals, can effectively reduce the WSN＇s power consumption. Simulate the multi - band OFDM modulation based on ultra wideband signals and its power spectral density with Matlab tool. Compare with the current wireless standards, analyze the non - interference between adjacent sub - bands and power of multi -bands OFDM, and propose adaptive sub- band selection algorithm. With the simulation and analysis, conclude that the modulation provides a good robust interference and coexistence performance and has low power, and can adapt to different environment. The multi - band OFDM modulation based on ultra wideband signals is a cost - effec- tive way to be integrated in the WSN instead of traditional radio transceiver, and the modulation has good application prospect.

关 键 词：超宽带 无线传感器网络 多频带 正交频分复用 

分 类 号：TN99[电子电信—信号与信息处理]