多载波无线电定位系统研究  

Research of the OFDM wireless orientation system

作　　者：石艳丽[1] 谭忠吉[1] 刘红[1] 

机构地区：[1]空军航空大学航空电子工程系,长春130022

出　　处：《电子测量技术》2009年第8期56-58,共3页Electronic Measurement Technology

摘　　要：研究了将多载波应用于传统扩频定位系统的方法,发射机将常规扩频信号分为若干个低速的窄带信号去分别调制相互正交的载波后发射出去,接收机通过重新组合,恢复出于原高速序列相同而有一时间差的高速序列,根据时间差确定接收机与发射机的距离。仿真结果表明,该方法在占用传统扩频定位系统带宽近一半情况下,达到和传统扩频定位系统相同的定位测距性能,提高了频谱利用率。This paper study the way that more carrier wave used on the conventional orientation system, general SS signal will be disassembled into some low velocity narrow frequency signal by transmitter, then separately modulated carrier wave signal that mutual vertical and transmit, receiver reset these signal, renew a high speed sequence with time difference, ascertaining distance between transmitter and receiver based on the time difference, emulational outcome indicate this way obtain the same orientation and measure distance performance compare with ordinary SS orientation system when it used the half of bandwidth, the svstem advance utilizeing rate of frequency.

关 键 词：多载波 无线电定位 测距 DS-SS 正交频分复用 

分 类 号：TN912[电子电信—通信与信息系统]