欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对超声波-射频室内定位系统信道分配问题复杂、实时性低下的问题,提出基于时间调制的超声波自主实时定位系统。该系统引入直接序列扩频技术,用时间和终端ID组成的二进制序列调制超声波实现信息携带,接收端在无射频模块的情况下通过恢复信息来估计超声波渡越时间,识别发射源并计算位置坐标。通过simulink对超声波信息携带方法进行了仿真验证,实验结果表明：系统通过扩频调制解调能够准确恢复时间信息,有效识别终端ID,区分不同终端信号源位置,并且对多址效应和多路径效应有较好的抗干扰效果,从而降低系统复杂性,提高响应时间并实现自主定位。
英文摘要：
For the problem of complexity of channel allocation and low real-time based on ultrasonic-RF indoor localization system,an independent real-time ultrasonic positioning system based on time modulation was put forward.The system applied direct sequence spread spectrum technology,binary sequence consisted of time and terminal ID modulate ultrasonic to implement information-carrying.The receiver estimated ultrasonic transit time,identified and calculated the position of the transmission source coordinates by restoring the information without RF module.Simulation experiment results showed that the system could accurately restored time information by spreading modulation and demodulation,valid identification terminal ID,to distinguish between different terminals source position and it had good effect on multi-access and multipath interference,thereby reducing system complexity,improving response time and achieve selfpositioning.
同期刊论文项目
同项目期刊论文
期刊信息
位置：