Patent ID: 8750403

Claim:
A method for limiting interference received by a plurality of destinations, the interference being generated by plural flows of complex modulation symbols transferred by a plurality of sources on same resources of a wireless telecommunication network, each source transferring a flow of complex modulation symbols to one destination, wherein a relay for each flow of complex modulation symbols, performs a method comprising: receiving complex modulation symbols; decoding complex modulation symbols of the flow of complex modulation symbols and successfully retrieving an information word from which the complex modulation symbols are derived; generating complex modulation symbols to be transmitted by the source which transmits the flow of complex modulation symbols derived from the information word; pre-coding the generated complex modulation symbols to be transmitted by the source which transmits the flow of complex modulation symbols derived from the information word, with a pre-coding matrix, the pre-coding matrix being defined so as to reduce interference generated by the flow of complex modulation symbols on the other flows of complex modulation symbols; and transferring the pre-coded complex modulation symbols at the same time as the complex modulation symbols transmitted by the source which transmits the flow of complex modulation symbols derived from the information word, wherein prior to pre-code the generated complex modulation symbols that will be transmitted by the source which transmits the flow of complex modulation symbols derived from the information word, and the method further includes: checking if at least one complex modulation symbol transmitted by the source prior the successful retrieving of the information word has not been transferred by the relay and if at least one complex modulation symbol transmitted by the source prior to the successful retrieving of the information word has not been transferred by the relay, generating complex modulation symbols transmitted by the source prior to the successful retrieving of the information word, generating complex modulation symbols to be transmitted by the source which transmits the flow of complex modulation symbols derived from the information word, combining the generated complex modulation symbols, pre-coding the combined complex modulation symbols with the pre-coding matrix, and transferring the pre-coded combined complex modulation symbols at the same time as the complex modulation symbols transmitted by the source which transmits the flow of complex modulation symbols derived from the information word.