| 摘要 |
A receiver for recovering data from Orthogonal Frequency Division Multiplexed (OFDM) symbols. The receiver includes a signalling and guard detector, which includes a correlator comprising a first branch having a first moving averaging filter, which is arranged to form pre-amble average correlated samples by averaging a value of a plurality of pre-amble correlated samples within a moving window, the plurality of samples averaged within the moving window corresponding to a temporal length of the post-amble (Tb), a second branch having a second moving averaging filter, which forms post-amble average correlated samples by averaging a value of a plurality of post-amble correlated samples within a moving window, the plurality of samples averaged within the moving window corresponding to a temporal length of the pre-amble (Tc), a combiner, which combines the averaged pre-amble correlated samples and the averaged post-amble correlated samples to form output correlation samples. |
