| 摘要 |
<p>In a communication system where data is transmitted on k sub-carriers and N pilot channels are averaged for coherent demodulation, k+N-1 pilot channels are broadcast on the k sub-carriers. In a first embodiment a first and a last plurality of sub-carriers comprise the additional N-1 pilot channels being broadcast at a second time period. For a second embodiment the first and the last sub-carriers comprise an additional plurality of pilot channels being broadcast at various time periods. Finally, for a third embodiment, each sub-carrier comprises a single pilot channel periodically broadcast, however a receiver utilizes multiple of these pilot channels for coherent demodulation of a single sub-carrier.</p> |
