between adjacent carriers is smaller than u03c0 radians it is then possible to compensate for each discontinuity caused by the inverse tangent function periodicity and thus unwrap the argument function in order to use the argument function for sample timing control it is necessary that the sampling of the received frame always starts inside the cyclically permuted interval the signalling interval if this condition is not fulfilled the argument function will be severely disturbed and will not be valid for sample timing control the present invention employs a new technique for finding the correct interval for frame sampling and uses an estimate of the magnitude of the disturbance of the argument function as an objective function a frame sampled inside the correct interval shows a minimum value for this magnitude the frame start time is stepped through a signalling interval length and the objective function is estimated for each step the step size is equal to the cyclic prefix size the frame start time that gives the minimum value of the objective function is then selected any measure that represents the magnitude of variations in the argument function can be used as an objective function in this technique an example of such a measure is given by equation 1 below the sum of the magnitudes of the argument differences of adjacent carriers is used as.