摘要
采用码分多址(CDMA)方式进行室内超声波定位,其相关运算量较大。针对这一问题,该文提出了基于码分多址-时分多址(CDMA-TDMA)结合的室内超声波定位方法。通过TDMA技术分时段发射经过CDMA编码后的超声波信号,利用到达时间差(TDOA)测距算法计算出未知目标的位置。采用MATLAB进行仿真,仿真试验中对4个信标分两个时间段发送的超声波信号进行发射与接收。结果表明,基于CDMA-TDMA结合的室内超声波定位方法能有效识别出信标节点,同时降低超声波CDMA定位方法中相关运算的计算量。
For the problem of large amounts of correlation calculation during indoor ultrasonic location based on CDMA,an improved indoor ultrasonic location method based on the combination of Code Division Multiple Access（CDMA）-Time Division Multiple Access（TDMA）was proposed in this work.The CDMA coding ultrasonic signals were emitted through TDMA technology,and the position messages of the unknown target can be calculated by the way of Time Difference of Arrival（TDOA）ranging algorithm.The ultrasonic signals of four beacons are transmitted and received in two different time periods in the MATLAB simulation experiment.The simulation results show that the improved indoor ultrasonic location method based on the combination of CDMA-TDMA can identify the beacons node effectively,At the same time,it can reduce the amount of calculation compared with the algorithm of the ultrasonic positioning based on CDMA.
出处
《压电与声光》
CAS
CSCD
北大核心
2016年第1期125-129,共5页
Piezoelectrics & Acoustooptics
基金
江西省教育厅科技基金资助项目(GJJ14125)
江西省教育厅科技基金资助项目(GJJ13056)
国家自然科学基金资助项目(41164001
41374039)
关键词
超声波
相关运算
码分多址
时分多址
室内定位
ultrasonic
correlation calculation
code division multiple access（CDMA）
time division multiple access（TDMA）
indoor location
