how to calculate interference?

n = 3; ri=0.9

source = 1;

destination = 3;

Link=(n*(n-1))/2;

c=2^Link;

NN = toeplitz(Link+1:-1:2)

mask = logical(fliplr(diag(ones(1,Link-1),-1)));

NN(mask) = 1;

for c = 0:2^Link-1

l = bitget(c, NN)

end

Edges = Link

for c = 0:2^Link-1

l = bitget(c, NN)

G = graph(l~=0)

G.Edges

path = shortestpath(G,source,destination)

end

D = zeros(3,3);

for r = 1:3

for s = 1:3

if r~=s

D(r,s) = sqrt(r.^2+s.^2);

end

end

end

how to calculate interference.

ri^m is the formula

m is the interfering node

Answer 1

[ag]

Hi @ankanna,

To calculate interference in a network graph using the formula ( interference = r_i^m ), where "r_i" is a given interference factor and "m" is the number of interfering nodes, you can follow the below steps:

1. Understand the Network Structure: You have a graph representing nodes and edges, where each edge can be either present or absent based on the binary representation of c.
2. Calculate Interference: For each path between the source and destination, determine the number of interfering nodes and apply the formula "r_i^m".

Below is a refined version of your code that includes the calculation of interference:

n = 3; % Number of nodes
ri = 0.9; % Interference factor
source = 1; % Source node
destination = 3; % Destination node
Link = (n * (n - 1)) / 2; % Total number of possible links
c = 2^Link; % Total number of configurations
NN = toeplitz(Link+1:-1:2); % Generate a Toeplitz matrix
mask = logical(fliplr(diag(ones(1, Link-1), -1)));
NN(mask) = 1; % Adjust the matrix with a mask

% Iterate over all possible edge configurations
for config = 0:2^Link-1
    l = bitget(config, NN); % Get the binary representation of config
    G = graph(l ~= 0); % Create a graph from the binary configuration
    
    % Check if a path exists between source and destination
    if haspath(G, source, destination)
        path = shortestpath(G, source, destination); % Find the shortest path
        m = length(path) - 2; % Number of interfering nodes (excluding source and destination)
        interference = ri^m; % Calculate interference
        fprintf('Configuration: %d, Path: %s, Interference: %.4f\n', config, mat2str(path), interference);
    end
end

% Calculate the distance matrix D
D = zeros(3, 3);
for r = 1:3
    for s = 1:3
        if r ~= s
            D(r, s) = sqrt(r^2 + s^2);
        end
    end
end
disp('Distance matrix D:');
disp(D);

This will print the path and corresponding interference for each configuration where a path exists between the source and destination nodes.

Hope this helps!