Signaling in wireless communication systems
View Patent ↗A communication device includes an RF receiver that receives a combined signal including a first signal transmitted from a first node and a second signal transmitted from a second node, a channel estimator that estimates first channel information of the first signal and second channel information of the second signal, respectively, a multiuser detector that detects original signal values of the combined signal using the estimated first and second channel information and an RF transmitter that transmits a signal generated based on the values detected by the multiuser detector to the first node and the second node during a predetermined period.
1. A communication method comprising:
receiving a combined signal including a first signal transmitted from a first node and a second signal transmitted from a second node;
estimating first channel information of the first signal using a first pilot signal and second channel information of the second signal using a second pilot signal;
detecting original signal values of the combined signal using the estimated first and second channel information;
decoding a vector composed of the original signal values detected by a multiuser detector using a first channel code;
encoding the decoded vector using a second channel code to generate an encoded vector; and
transmitting a third signal generated based on the encoded vector during a predetermined period to the first node and the second node, wherein the third signal represents the encoded vector.
2. The communication method of claim 1 , wherein the original signal values are detected by a multiuser detecting method comprising a joint-ML (maximum likelihood) detecting method.
3. The communication method of claim 1 , wherein the first channel code and the second channel code have linearity.
4. The communication method of claim 1 , wherein the original signal values are detected by a multiuser detecting method comprising a LLR (log likelihood ratio) detecting method.
5. The communication method of claim 1 , wherein the first channel information includes a received power level and a channel coefficient of the first signal, and the second channel information includes a received power level and a channel coefficient of the second signal.
6. The communication method of claim 1 , further comprising modulating the encoded vector onto a carrier signal to generate the third signal.