1. A receiver for determining a time measure depending on a time of arrival of a pulse signal comprising a sequence of pulses from a transmitter, comprising: an integrator comprising a variable and controllable integration window, extending from a starting point to an integrator sampling point; an integrator controller for controlling the integration window in a time-successive way so that the sampling points of successive integration windows are changed by a time delay from a current integration window to a later integration window, wherein the time delay is smaller than half of the integration window; and an output processor for generating the time measure as an indication indicating which later integration window comprises a sampled integrator value exceeding a threshold or being larger than a sampled integrator value for a timely preceding or timely succeeding integration window.