Method for transmitting and receiving data in cooperative communication system, and cooperative communication method
A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.
1. A data transmission method of a source node, comprising:
transmitting a data to a relay node in a first time slot;
transmitting the data to a destination node in a second time slot after the first time slot,
wherein the relay node transmits the data to the destination node in the second time slot,
wherein the data includes first symbols and second symbols,
wherein the first symbols and the second symbols are allocated in different frequency resource,
wherein the relay node transmits the data to the destination node in the second time slot, based on FD (Full Duplex) or HD (Half Duplex),
wherein the source node performs beamforming training,
by transmitting the training sequence with respect to omni-direction of an antenna pattern covering all direction, and
wherein, after the beamforming training, the source node transmits the data to the relay node in the first time slot using a first antenna pattern directed towards the relay node, and transmits the data to the destination node in the second time slot using a second antenna pattern directed towards the destination node.
2. The method of claim 1 , wherein the first symbols are derived by applying a complex conjugation to the second symbols, or the second symbols are derived by applying a complex conjugation to the first symbols.
3. The data transmission method of claim 1 , wherein the source node modulates the data using QPSK or 16 QAM.
4. The data transmission method of claim 1 , wherein the first symbols are odd symbols and the second symbols are even symbols.
5. The data transmission method of claim 1 , wherein the first symbols are even symbols and the second symbols are odd symbols.
6. A data transmission method of a relay node, comprising:
receiving a data from a source node in a first time slot;
transmitting the data to a destination node in a second time slot after the first time slot;
wherein the data includes first symbols and second symbols,
wherein the first symbols and the second symbols are allocated in different frequency resource,
wherein the relay node transmits the data to the destination node in the second time slot, based on FD (Full Duplex) or HD (Half Duplex),
wherein the source node performs beamforming training,
by transmitting the training sequence with respect to omni-direction of an antenna pattern covering all direction, and
wherein, after the beamforming training, the source node transmits the data to the relay node in the first time slot using a first antenna pattern directed towards the relay node, and transmits the data to the destination node in the second time slot using a second antenna pattern directed towards the destination node.
7. The data transmission method of claim 6 , wherein the source node modulates the data using QPSK or 16 QAM, and transmits the modulated data to the relay node in the first time slot.
8. A data transmission method of a destination node, comprising:
receiving a data from a source node in a second time slot;
receiving a data from a relay node in a second time slot;
wherein the source node transmits the data to the relay node in a first time slot before the second time slot;
wherein the data includes first symbols and second symbols,
wherein the first symbols and the second symbols are allocated in different frequency resource,
wherein the relay node transmits the data to the destination node in the second time slot, based on FD (Full Duplex) or HD (Half Duplex), and
wherein the source node performs beamforming training,
by transmitting the training sequence with respect to omni-direction of an antenna pattern covering all direction,
wherein, after the beamforming training, the source node transmits the data to the relay node in the first time slot using a first antenna pattern directed towards the relay node, and transmits the data to the destination node in the second time slot using a second antenna pattern directed towards the destination node.
9. The data transmission method of claim 8 , wherein the source node modulates the data using QPSK or 16 QAM, and transmits the modulated data to the relay node in the first time slot.