ROBUST SENSING OF DVB-T/H TRANSMISSIONS IN THE PRESENCE OF FREQUENCY OFFSETS

摘要

A method and system for detecting the presence of DVB (Digital Video Broadcasting) transmission with frequency offset is provided. Method includes receiving an RF (Radio Frequency) signal on the selected channel (901); Step 902 for generating samples from the received RF signal; Estimating a frequency offset of the sample 903; Step 904 to correct the samples as the estimated frequency offset; Step 905, correlating the corrected samples with a reference signal; And a correlation result and a step 906 for comparison with the threshold value. The frequency offset estimate is fixed in all symbol sub-step of selecting a boost of a set of consecutive pilot which are three or more pilot carriers transmitted from the position 1001; Converting the received samples to the frequency domain (1002); A step of determining the positions of the maximum value in the transformed samples, said determining step are the maximum value 1003, corresponding to the set of pilots; And a step (1004) for comparing the expected position of the pilot in the determined position and set. ;