| 摘要 |
A data communications apparatus which uses the same frequency band and modulation scheme with those used in the counterpart apparatus, and has a simple configuration and shows high reliability in transmitting and receiving high-rate data through a cable network. The main processing unit receives the first data from the data processing device to perform orthogonal frequency division multiplexing (OFDM) on the first data to generate first OFDM signal, and demultiplexes second OFDM signal from the counterpart apparatus to recover the second data and provide to the data processing device. The RF unit transforms the first OFDM signal into a radio frequency band to generate the first modulated signal and transmit to the counterpart apparatus through the second port and the cable network. Also, the RF unit receives the second modulated signal from the counterpart apparatus to recover a second OFDM signal and provide to the main processing unit. The medium access control performing means detects collision in the cable network and selectively activates the main processing unit so that the RF unit transmits and receives signal to and from the counterpart apparatus through a common cable line.
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