摘要
超宽带信号为代表的无线实时定位系统近年来得到了广泛的发展。现有的超宽带无线实时定位系统由于宽带信号的特性需求,其架构复杂性,成本,及可靠性均居高不下,限制了无线定位系统的广泛应用。在该文提出应用脉冲频率合成超宽带技术的定位系统,通过多个不同载频的窄带脉冲信号的信号处理,达到了等效的超宽带定位效果的同时大幅降低了系统复杂度和成本。解析及仿真结果验证了本文提出方案的有效性,本文所提出的方案对于定位系统的开发具有重要的指导性意义。
This paper presents a method of license plate character recognition based on the combination of Zernike moment and wavelet transformation features.RTLS system based on UWB signals has been widely utilized recently.However,due to the requirement of Ultra Wideband signals,existed location system usually faces problems including complexity,robust and cost,which limit its application.In this paper,we propose a new approach to achieve ultra wideband signal through pulse synthetic wideband method.The system will send a series of narrow band signal and utilize signal processing algorithm in the receiver side to obtain the same performance as a ultra wideband signal but with significantly decreased complexity and cost.The simulation result approved the proposed method,which may guide novel low cost RTLS system.
出处
《电子测量技术》
2014年第3期128-133,共6页
Electronic Measurement Technology
基金
中国科学院无线传感网与通信重点实验室开放课题课题(2013004)
中国科学院大学院长基金联合支持
