matlab中寻找邻居节点,MATLAB代做-python代做-FPGA代做-未知节点利用邻居锚节点进行定位，没有邻居锚节点…

核心提示：MATLAB代做-python代做-FPGA代做-未知节点利用邻居锚节点进行定位，没有邻居锚节点 …

function RSSI()

% 未知节点利用邻居锚节点进行定位，没有邻居锚节点的未知节点无法定位

% 根据接收信号强度转化为距离。规则传播模型下得到的距离跟实际距离没有误差

% 不规则通信模型下，规则传播模型下得到的距离跟实际距离存在误差

%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

load ‘../Deploy Nodes/coordinates.mat’;

load ‘../Topology Of WSN/neighbor.mat’;

directory=cd;

cd ‘../Topology Of WSN/Transmission Model/’;

cd(model);

unknown_node_index=all_nodes.anchors_n+1:all_nodes.nodes_n;

for i=unknown_node_index

neighboring_anchor_index=intersect(find(neighbor_matrix(i,:)==1),find(all_nodes.anc_flag==1));%只利用邻居锚节点进行定位

neighboring_anchor_n=length(neighboring_anchor_index);

if neighboring_anchor_n>=3

try

dist=rss2dist(neighbor_rss(neighboring_anchor_index,i),1);

catch

dist=rss2dist(neighbor_rss(neighboring_anchor_index,i));

end

neighboring_anchor_location=all_nodes.estimated(neighboring_anchor_index,:);

%~~~~~~~~~~~~~~~~~~~~~~~~~三边测量法(最小二乘法)

A=2*(neighboring_anchor_location(1:neighboring_anchor_n-1,:)-repmat(neighboring_anchor_location(neighboring_anchor_n,:),neighboring_anchor_n-1,1));

neighboring_anchor_location_square=transpose(sum(transpose(neighboring_anchor_location.^2)));

dist_square=dist.^2;

b=neighboring_anchor_location_square(1:neighboring_anchor_n-1)-neighboring_anchor_location_square(neighboring_anchor_n)-dist_square(1:neighboring_anchor_n-1)+dist_square(neighboring_anchor_n);

all_nodes.estimated(i,:)=transpose(A\b);

all_nodes.anc_flag(i)=2;

end

end

%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

cd(directory);

save ‘../Localization Error/result.mat’ all_nodes comm_r;

end

联系：highspeedlogic

QQ ：1224848052

微信：HuangL1121

邮箱：1224848052@qq.com

微信扫一扫：