1. A receiver adapted to receive and process a radio signal and initialize an initial value of a parameter, the receiver being characterized by means for: comparing a new delay of the received signal and an old delay of a previously received signal; if the new delay and the old delay are the same, then initializing the initial value of the parameter to be an existing value; and if the new delay and the old delay are not the same, then interpolating information and initializing the initial value of the parameter to be the interpolated value.