【摘要】 超宽带(UWB)技术具有传输速率高、抗多径能力强、时间分辨率好等优点,在精准室内定位中,利用UWB信号的时间分辨高的特点作为定位具有广阔的应用前景。以脉冲无线电体制的超宽带(IR-UWB)作为定位信号的研究对象,结合随机跳时(TH)的抗干扰和脉冲位置调制(PPM)定位分辨能力的PPM-TH-UWB作为定位信号源。详细给出了定位信号的生成原理、模拟模块组成、仿真步骤和参数选择方法。研究UWB室内信号经过4种复杂环境信道生成信号的模拟方法。为逼真地反映实际测量的UWB定位信号,还研究经历复杂环境和有噪声下的接收定位信号模拟。仿真结果表明复杂环境下的定位信号杂乱模糊,熟知这些信号的特点,为以后研究UWB信号在复杂室内环境中的定位算法和提高定位精度提供数据来源和理论支撑。更多还原

【Abstract】 Ultra-wideband(UWB)technology has the advantages of high transmission rate, strong anti-multipath capability, and good time resolution. In precision indoor positioning, the use of UWB signals with high time-resolved features has broad application prospects in positioning.In this paper, the ultra-wideband(IR-UWB)of the pulse radio system is used as the positioning signal s study object. The PPM-THUWB, which combines the anti-interference of the random time hopping(TH)and the pulse position modulation(PPM)positioning resolution ability, is used as the positioning signal source.The thesis gives in detail the principle of positioning signal generation, the composition of the simulation module, the simulation step method and the parameter selection method.The simulation method of UWB indoor signal generation signal through four kinds of complex environment channels is studied.In order to realistically reflect the actual measured UWB positioning signals, the paper also studies the simulation of receiving positioning signals under complex environments and noisy. The simulation results show that the positioning signals under complex environments are very complex and in a jumble. You are familiar with the characteristics of these signals.Signal positioning algorithms in complex indoor environments and improved positioning accuracy provide data sources and theoretical support.And improve the positioning accuracy to provide data sources and theoretical support.更多还原