www.gusucode.com > 无线传感器网络定位算法 matlab源代码 包含七个算法matlab源码程序 > Localization/Deploy Nodes/square_random.m
function square_random(square_L,nodes_n,anchors_n,GPS_error) % deploy the sensor nodes over a square sensing region % square_L: the length of the side of a square % nodes_n: the number of nodes, including anchors and normal nodes % anchors_n: the number of anchors % if anchors_n<1, it means the ratio; % if anchors_n>1, it means the number % GPS_error:the max location error of anchor raised by GPS, default is 0; %~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~` % square_random(200,200,0.1) if anchors_n<1 anchors_n=round(nodes_n*anchors_n); % translate the ratio end if nargin==3 GPS_error=0; end all_nodes.square_L=square_L; all_nodes.nodes_n=nodes_n; all_nodes.anchors_n=anchors_n; all_nodes.true=unifrnd(0,square_L,nodes_n,2); %true coordinates GPS_error=unifrnd(0,GPS_error,all_nodes.anchors_n,1); error_angle=unifrnd(0,2*pi,all_nodes.anchors_n,1); all_nodes.estimated=[all_nodes.true(1:anchors_n,:)+[GPS_error GPS_error].*[cos(error_angle) sin(error_angle)];zeros(nodes_n-anchors_n,2)]; %estimated coordinates; for anchors, .estimated=.true all_nodes.anc_flag=[ones(anchors_n,1);zeros(nodes_n-anchors_n,1)]; %0-unresolved unknown; 1-anchor; 2-resolved unknown save coordinates.mat all_nodes; end