A data transmission method using OFDM, Physical Layer Network Coding, and decoding of a signal superposition.

摘要

The invention is related to a method for transmitting data using physical layer network coding whereby a first sending device (A) transmits a first data packet to a relay device (R) and a second sending device (B) transmits a second data packet to a relay device (R). The relay device (R) decodes a linear combination of the received data packet and transmits the decoded data to both the first and the second sending device (A, B). The first and the second sending device (A, B) respectively subtract the first or the second data packet from the decoded data received from the relay device (R) so that the first sending device (A) is able to recover the second data packet and the second sending device (B) is able to recover the first data packet. According to the invention orthogonal frequency division multiplexing modulation is applied to the first and second data packet by the first and second sending device (A, B) by appending a cyclic prefix and/ or a cyclic suffix to each data packet before transmitting it to the relay device (R).