Can a D2D user (a device) transmit simultaneous different signals to a cellular user and a D2D receiver. If we suppose that the D2D device is equipped with SDR technology and can change their frequency channel while transmitting to a cellular user. Moreover will the power factors and timeslots with which it is transmitting will be different in this case.

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    – Ron Maupin
    Dec 15 '19 at 19:56

No. A single radio, software-defined or not, can't transmit multiple signals at any time. You can interleave transmissions (by packet, TDM, ...) but you can't have them simultaneously. You'd need a second radio.

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