Disclosed herein are methods and devices for determining a received time difference between a first OFDM signal received from a first base station and a second OFDM signal received from a second base station. The methods and apparatus disclosed herein may be applied to 3GPP LTE systems as well as other OFDM-based wireless communication systems. An exemplary method comprises determining a decoding synchronization time for each of the first and second OFDM signals and calculating a time difference between the respective decoding synchronization times. The calculated time difference is transmitted by the mobile terminal to the first base station, the second base station, or both. Methods and apparatus for processing, at a base station, time difference information calculated according to the methods herein and transmitted to the base station by a mobile terminal are also presented.