(Give suggestion me)Dual Least-Squares Estimator of the Errors-In-Variables Model Using Only First And Second Moments

Sorry for bothering you. I am interested in this research (Dual Least-Squares Estimator of the Errors-In-Variables Model Using Only First And Second Moments ) very much. Now i understand about theory of Dual Least-Squares Estimator of the Errors-In-Variables Model Using Only First And Second Moments. But i have a problem about How use practically of equation 29. Example, in case simulation, we known x* because x* from generate Uniform(3,9) follow in your paper but in practical (real data set) we have observation y and x so x* is unobservation but equation 29 (Max NVSI) have x*. Do you have suggestions or concept for approximate set x*. I hope you help me and i waiting for you suggestion. Thank you so much for taking the time to help me. Pleases take your time.