ctr.m

卫星链路的计算

function CTRTotal = CTR(CTRu,CTRd,CTRim,CTRi)
% This function caculates the carrier to temperature ration of the system
% input parameter includes carrier to temperature ratio by uplink, downlink
% intermodulation interference, and other interference, such as adjacent
% channel interference.

%args = [];
if nargin<2
    error('Not enough input arguments.')
elseif nargin==2
    t1 = 1/10^(CTRu/10);
    t2 = 1/10^(CTRd/10);
    t3 = 0;
    t4 = 0;
elseif nargin==3
    t1 = 1/10^(CTRu/10);
    t2 = 1/10^(CTRd/10);
    t3 = 1/10^(CTRim/10);
    t4 = 0;
elseif nargin==4
    t1 = 1/10^(CTRu/10);
    t2 = 1/10^(CTRd/10);
    t3 = 1/10^(CTRim/10);
    t4 = 1/10^(CTRi/10);
else
    error('Too many input arguments.')
end

%for j = 1:nargin
%    args(j) = 10^(varargin(j)/10);
%    temp = temp + 1/args(j);
%end
temp = t1+t2+t3+t4;
CTRTotal = 10*log10(1/temp);