A method for limiting a transmission rate is provided. The link device includes only a set of angular sectors of elastically deformable stirrups, arranged to grip together the inner peripheral edges of the upstream and downstream rings by clamping one against the other. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment. This invention improves CDMA mobile channel decoder performance using a new technique for calculating more accurate estimates of the signal to interference plus noise ratio at the input of the mobile channel decoder. The base plate 15a is joined to a foundation through the elongated aperture 15e of the fastening device 15.