| 摘要 |
<p>An improved receiver is disclosed for decoding spread-spectrum coded signals received through a multi-path propagation channel to obtain decoded information symbols. The receiver comprises a converter for filtering, amplifying, sampling and converting received signals to representative numerical samples and a correlator for correlating the numerical signal samples with a despreading code over each of the information symbol periods to obtain, for each symbol period, complex correlations for different time-alignments between the despreading code and the signal samples, each time-alignment corresponding to a different one of the multiple propagation paths. The receiver further includes hypothesizing means for hypothesizing data symbol sequences, channel estimation means for forming channel estimates for each of the multiple propagation paths as a function of the complex correlations and the hypothesized symbol sequences and decision means to select the most likely of the hypothesized sequences using the channel estimates thereby decoding the information symbols.</p> |
