a method for shared estimation of parameters is described , which together with an error vector e , describe the connection between a digitally modulated reference signal inputted to a transmission channel and a received receiver signal z which is at an end of the transmission channel . the method includes the following steps : forming the error vector e in dependence of the parameters , a reference signal s , and the receiver signal z ; linearizing the error vector e ; substituting a real parameter of the linearized error vector through components of a estimation vector , wherein a substituted error vector is produced ; inserting the substituted error vector into the cost function ; and determining the estimation vector through gradient development of the cost function and subsequently setting the gradient to zero .