SYNCHRONIZATION OF RECEIVED SYMBOLS FOR OFDM

摘要

The device for the synchronization of received signals (60) using orthogonal frequency-multiplex transmission methods determines the channel transmission function (86) from the received signal (60) of a plurality of transmitted known pilot symbols using a channel transmission function determination device (62). From this, a channel pulse response determination device (64) determines the channel pulse response (88). To this end, a transmitted signal has at least one transmission frame and each transmission frame has at least one guard interval. The channel pulse response of the transmission channel contains several time-delayed components. Each possible synchronization time corresponds precisely to one position of the guard interval relative to the channel pulse response. The metric determination device (65) forms a metric for all possible synchronization times, which are dependent on the output of the channel pulse response within the respective guard interval. The metric maximization device (66) determines the correct synchronization time (68) of the received signal (60) by maximizing the metric.