| 摘要 |
A frame is effectively transmitted and received by setting an optimal preamble length according to transmission environments between communication apparatuses. A data communication system includes a synchronization detection part to detect bit synchronization based on the preamble of the frame received to the second communication apparatus from the first communication apparatus, a synchronization position information generating part to generate synchronization position information of a position of the bit synchronization, which is in the frame received in the second communication apparatus, detected by the synchronization detection part, a preamble length calculating part to calculate an optimal value of a length of the preamble based on the synchronization position information, and a transmit command issuing part to issue a transmit command of transmission of the frame including the preamble having the length based on the optimal value from the first communication apparatus to the second communication apparatus. |
