| 摘要 |
In the present invention, a data receiving device receives signals sent from a plurality of data transmission devices. The signals sent from each of the data transmission devices have a frame format comprising a plurality of data units that become the units for doing spread spectrum modulation using a spreading code. Data units that are mutually adjacent within a single frame format are modulated using mutually orthogonal spreading codes. The number of data units included in a single frame format is the same for the plurality of data transmission devices, and data units in corresponding positions undergo spread spectrum modulation using the same spreading code. Without providing a signal receiving function to a data transmission device in a spread spectrum communication system, it is possible to suppress an increase in the number of demodulation routines in a receiving device, and suppress an increase in the probability of signal collisions that cannot be demodulated. |
