quasi_new_method_optmized_for_simulation.m

gps选星算法仿真程序 对matlab放着做了优化,这是一种新的近优化方法

% calculate quasi_new_method_optmized_for_simulation
% 1-26-2009
% nick @ETS

%% function info
%inputs:
%N : visible SV number
%LOS = [l1; l2; ... ; lN]: visible SV LOS matrix 
%M : number of SV needed to be selected, usually equals the channle number

%ouput:
%min_pdop : my quasi optimum PDOP

%% code of quasi_new_method_optmized_for_simulation
function min_dop = quasi_new_method_optmized_for_simulation( LOS, N )
current_LOS = LOS;
min_dop = zeros(1, N);
for M = 4:N-1
    %choose N-1 from N each time, and kick out the 1 SV from LOS
    [min_dop(N-M+3), sv_kickout ] = opti_pdop_sel3( current_LOS, N-M+4);
    current_LOS(sv_kickout,:) = [];
end
min_dop(N) = sqrt(trace(inv(LOS'*LOS)));