Methods and apparatus in a multi-carrier cellular wireless network with random access improve receiving reliability and reduce interference of uplink signals of a random access, while improving the detection performance of a base station receiver by employing specifically configured ranging signals. An image combining unit generates a composite image based on the latest second image and the specific first image. The diffractive optical element is movable with respect to other optical elements within the resonator for adapting the filtered wavelength to the increase or decrease of the optical path length. Furthermore, the control module responds to a user speed selection and to preset speed selection ranges to reconfigure the controls as appropriate to constraints of a fastener drive assembly and to user preferences.