基于FDMA的超声波室内定位信标识别方法

在超声波室内定位的信标识别问题上,针对无线射频控制分配的信道策略复杂性高、定位滞后和基于码分多址(CDMA,code division multiple access)方法的自相关运算量巨大问题,提出基于频分多址(FDMA,frequence division multiple access)的超声波室内定位信标识别方法,令超声波具备信息携带能力.通过对信号调制技术的分析,在超声波频率响应范围内,利用不同频率的载波调制信源身份识别码,接收节点通过解调、匹配区分信号源进行定位.采用Simulink对多路信号传输过程以及调制与解调进行仿真,并用电路仿真发射、识别了编码.结果表明,FDMA方法能有效区分多路信号源互相干扰,准确恢复发射节点身份识别码,大大减少计算量,有利于定位效率的提高.

Beacon Identification Method of Ultrasound Indoor Positioning Based on FDMA

In order to solve the problem of beacon identification ultrasound indoor positioning,the allocation of radio frequency control channel has high complexity,positioning lag and huge calculation of the autocorrelation computation based on CDMA (code division multiple access) method.Ultrasound indoor positioning beacon identification method based on FDMA (frequency division multiple access)is proposed.Through the analysis of signal modulation technique,it uses different frequency carrier modulated signal source identification code in the ultrasonic frequency response range,and the receiving node distinguishes the signal source to locate the target through demodulation and matching.It uses Simulink for multiplex signal transmission and modulation and demodulation simulation,codes are transmitted and recognized with the circuit simulation.The results show that FDMA method can effectively distinguish interfere between multiple sources,accurately restore transmitting node identification code,greatly reduce the amount of calculation in favor of locating efficiency.