Quasi-convexity of the asymptotic channel MSE in regularized semi blind estimation

Abla Kammoun, Karim Abed-Meraim, Sofiene Affes

In this paper, the quasi-convexity of a sum of quadratic fractions in the form ${\sum }_{i=1}^n\frac{1+c_i{x}^2}{{\left(1+d_{i}x\right)}^2}$ is demonstrated where $c_i$ and $d_i$ are stri…