| 摘要 |
<p>Channel selection at a broadcast receiver for receiving multiplexed broadcast signals is readily and quickly done with good response, improving the convenience of the user. At ground broadcasting stations (BC1, BC2), the spectrum-spreading codes for the channels are made in phase, then the broadcast signals of the channels are code-division multiplexed, and the broadcast signals are transmitted through a geostationary satellite (SAT) to broadcast receivers (MS) in the service area. Alternatively, at a geostationary satellite (SAT), the differences among the spectrum-spreading codes for the channels of CDM broadcast signals transmitted from ground broadcasting stations (BC1, BC2) are found, the spectrum-spreading codes are made in phase based on the differences, and the broadcast signals are transmitted to broadcast receivers (MS).</p> |
