基于多载波同步的最大能量TOA估计算法  

Maximum Energy TOA Estimation Algorithm based on Multi-Carrier Synchronization

作　　者：唐菁敏[1] 王朝阳 周旋 张伟[1] 王红彬 

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《通信技术》2017年第11期2448-2453,共6页Communications Technology

基　　金：国家自然科学基金(No.41364002);云南省科技计划项目(No.14051571)~~

摘　　要：针对无线定位系统中TOA时延精度估算低的问题,基于抗干扰能力强的OFDM系统模型,对S模式信号的脉冲上升沿的到达时间估计值进行测量,利用最大能量回寻搜索方法,对TOA时刻进行高精度计算,提出了一种基于多载波同步的最大能量TOA估计算法。通过多载波调制技术将数据流传输速度降低,以达到减少符号间干扰的目的,同时利用MES-SB法从低速的数据流中提取能量块,以高精度地计算出TOA时刻。通过仿真实验结果可以验证,提出的OE-TOA算法对比SMR算法和O-TOA算法有着更快的计算速度和收敛速度,且在均方根误差精度计算方面提升明显。Aiming at the problem of low estimation accuracy of TOA delay in wireless location system, based on OFDM system model with strong anti-interference ability, the measurement of arrival-time estimation for the pulse rising edge in S mode signal is done, and then ~th maximum energy search method the TOA time accurately calculated, and the maximum energy TOA estimation algorithm based on multi carrier synchronization proposed, By using multiearrier modulation technology to reduce the speed of data stream transmission, the pulse of reducing inter-symbol interference is achieved, while by using MES-SB method to extract energy blocks from low--speed data streams, the high-precision TOA moment calculated. The simulation results indicate that the proposed OE-TOA algorithm has faster calculation speed and convergence speed than the SMR algorithm and the O-TOA algorithm, and could clearly improve the accuracy of root mean square error calculation.

关 键 词：多载波 TOA 最大能量 同步 

分 类 号：TN929.5[电子电信—通信与信息系统]