There is something wrong with the code line with “`T = [W * F(:,:,j), sigma * W, sigma_z * U]';`

“

Did I correctly write the code line:”`sigma_z = sqrt( (P_max - square_pos(norm(OBJ,'fro')))/(M - K));`

”?

How to deatl with this problem?

```
clear;
num_CSI = 1;
P_max = 10; % dB
P_max = 10 ^ (P_max / 10); % the true total power
M = 4; % number of relays
K = 2; % number of S-D pair
gama = 0.3; % MSE target
sigma = sqrt(0.1); % noise variance
epsilon = 0.1; % norm-bounded
j = 1;
while (j <= num_CSI)
F(:,:,j) = (randn(M,K) + sqrt(-1) * randn(M,K)) / sqrt(2); %
G(:,:,j) = (randn(M,K) + sqrt(-1) * randn(M,K)) / sqrt(2);
j = j + 1;
end
I = eye(K);
for j =1:1
[U_svd S_svd V_svd] = svd(G(:,:,j)');
U = V_svd(:,(K+1):M);
cvx_begin sdp quiet
cvx_solver sedumi
variable W(M,M) complex;
variable mu;
variable lambda(K);
expression c(2*M,1);
expression T(2*M,M);
expression sigma_z;
expression OBJ(M,M + K);
minimize(mu); % object function
subject to
OBJ = [W * F(:,:,j), sigma * W];
sigma_z = sqrt( (P_max - square_pos(norm(OBJ,'fro')))/(M - K));%vec(OBJ)
for k = 1:K
c = [G(:,k,j)' * W * F(:,:,j) - I(k,:), sigma * G(:,k,j)' * W, zeros(1,(M-K))]';
T = [W * F(:,:,j), sigma * W, sigma_z * U]';%
[gama - sigma^2 - lambda(k), c', zeros(1,M);
c, eye(2*M,2*M), -epsilon * T;
zeros(M,1),-epsilon * T', lambda(k) * eye(M,M);] >= 0;
lambda(k) >= 0;
end
norm(OBJ,'fro') <= sqrt(mu);
cvx_end
if strfind(cvx_status,'Solved')
pow = mu
WW = W
end
end
```