| 摘要 |
A control unit adjusts the number of streams for each of a plurality of packet signals and specifies a packet signal whose number of streams is the maximum among the packet signals whose number of streams has been adjusted. The control unit assigns a known signal and a data signal to each of streams for the specified packet signal. While setting another stream, the control unit assigns an extensional known signal to the another stream. The control unit also assigns a known signal and a data signal to at least one of streams for the packet signals which have not been specified.
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