OFDM COMMUNICATION CHANNEL

摘要

In an OFDM-based receiver, means for achieving time synchronization comprising: A. means for extracting pilot signals; B. means for analyzing the pilot signals in the frequency domain; C. means for correcting the synchronization error responsive to the signal indicative of the synchronization error. In an OFDM-based receiver, automatic frequency correction means comprising: A. an inner frequency correction loop; B. an outer frequency correction loop for correcting the LO frequency. In an OFDM-based receiver, a channel sounder comprising: A. means for extracting pilot signals contained in the OFDM received signal; B. means for analyzing the pilot signals in the frequency domain; C. means for analyzing the signals indicative of a distortion in each pilot signal and for computing therefrom corrective signals.