What is the best way to deal with trace over trace function?

1

I have trace(W_c)/trace(W_r) in the objective function but the CVX does not accept affine over affine (which could be generally nonconvex). Is there any idea to deal the trace expression mentioned above?

2

Maybe Linear-fractional programming, if applicable to your problem. Section 4.3.2 of https://stanford.edu/~boyd/cvxbook/bv_cvxbook.pdf .