基于改进变尺度法的超宽带定位新算法

计算机应用 ›› 2014, Vol. 34 ›› Issue (12): 3395-3399.

基于改进变尺度法的超宽带定位新算法

郭建广,郑紫微,杨任尔

宁波大学通信技术研究所, 浙江宁波 315211

收稿日期:2014-07-07 修回日期:2014-08-21 发布日期:2014-12-31 出版日期:2014-12-01
通讯作者: 郭建广
作者简介:郭建广(1988-),男,湖北黄冈人,硕士研究生,主要研究方向:移动通信；郑紫微(1975-）,男,福建永春人,教授,博士生导师,主要研究方向:移动通信、宽带信息传输；杨任尔(1968-）,女,浙江余姚人,副教授,博士研究生,主要研究方向:无线通信、信息隐藏。
基金资助:
国家科技重大专项;浙江省杰出青年科学基金资助项目;教育部高等学校博士学科点专项科研基金资助项目;宁波市科技创新团队项目

New UWB localization algorithm based on modified DFP algorithm

GUO Jianguang,ZHEN Ziwei,YANG Rener

Institute of Communication Technology, Ningbo University, Ningbo Zhejiang 315211, China

Received:2014-07-07 Revised:2014-08-21 Online:2014-12-31 Published:2014-12-01
Contact: GUO Jianguang

摘要/Abstract

摘要：

针对传统定位算法收敛速度慢的问题,结合超宽带通信具有时间分辨率高的特点,在到达时间差(TDOA)定位模型的基础上,采用基于Armijo步长的变尺度法(DFP)对目标节点进行初始定位,进一步在初始位置处以泰勒级数展开算法得到目标节点的最终位置,实现超宽带(UWB)通信系统精确定位。实验结果表明,采用改进变尺度法的初始坐标修正算法,不仅能够降低定位优化算法对于初始坐标的要求,而且在测量时间准确的前提下,相比传统最速下降法平均定位精度有7倍的改进,整个算法具有好的定位精度和定位效率。

Abstract:

Aiming at the problem that traditional localization algorithm has a slow convergence speed, combining with the characteristics of perfect immunity to time in UWB (Ultra Wide-Band) communication, a novel Davidon-Fletcher-Powell (DFP) algorithm based on Armijo step size was proposed to locate the target node on TDOA (Time Difference Of Arrival) location model. Taylor series expansion algorithm was further introduced to acquire final location at the initial position, achieving the precise location of UWB communication system. The experimental results show that the proposed algorithm not only decreases the demand of localization optimization algorithm to initial position, but also improves the average localization precision 7 times than the steepest decent method with precise measure time. The proposed localization algorithm has better performance on localization accuracy and efficiency.

中图分类号:

TN911.7

郭建广郑紫微杨任尔. 基于改进变尺度法的超宽带定位新算法[J]. 计算机应用, 2014, 34(12): 3395-3399.

GUO Jianguang ZHEN Ziwei YANG Rener. New UWB localization algorithm based on modified DFP algorithm[J]. Journal of Computer Applications, 2014, 34(12): 3395-3399.

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