基于超宽带无线自组织网络的协作定位算法

Cooperative Positioning in Ultra Wide Band Wireless Ad Hoc Network

在无线自组织网络中,目标节点通常无法直接和足够多的参考节点进行通信来确定自己的位置。为此,提出一种基于超宽带无线自组织网络的协作定位(CP,Cooperative Positioning)算法。在目标节点通信范围内只有少量参考节点的情况下,协作定位算法通过目标节点和其通信范围内非参考节点的协作,实现目标节点的定位。此外,由于非视距环境严重降低了节点的测距精度,从而产生较大的定位误差。通过采用协作定位算法,节点可以放弃非视距参考节点,选择非参考节点进行精确定位。

In wireless ad hoc network,target node usually can not communicate with enough anchors to get its position.A Cooperative Positioning（CP） approach was proposed.In the condition that target node can only communicate with a few number of anchors,CP can locate the target node by cooperating with non-anchor node in the communication range of the target node.Meanwhile,in NLOS（non-Line-of-Sight） conditions,the positioning accuracy decreases dramatically,since range estimates are positively biased.With CP,without considering the NLOS anchor,target node can get accurate position through selecting non-anchor nodes.