Method for equalization of a data signal taking account of interference channels

1. A method for equalization of a signal that is transmitted via a data channel based on a decision feedback (DF) method, and taking account of at least one interference channel, comprising:

processing at least two trellis diagrams in each time unit, with the states of at least one of the trellis diagrams partially or exclusively describing the data channel, and a DF contribution that is used for the processing of the at least one trellis diagram including information about the at least one interference channel.

2. The method according to claim 1 , wherein the at least one trellis diagram comprises states that describe exclusively the data channel is processed in each time unit.

3. The method according to claim 2 , wherein the DF contribution that contains the information about the at least one interference channel is obtained by processing a trellis diagram for the at least one interference channel.

4. The method according to claim 2 , wherein the states of the at least one trellis diagram describe the data channel subject to a condition that state transitions are assumed to occur in the at least one interference channel.

5. The method according to claim 2 , wherein the DF contribution takes account of information about the at least one interference channel, and the at least two trellis diagrams describe exclusively the data channel and are processed in each time unit.

6. The method according to claim 1 , wherein the states of one of the at least two trellis diagrams describe the data channel subject to a condition of assumed states in the at least one interference channel, and the information that is contained in the DF contribution that is used for processing of the one of the at least two trellis diagrams for the at least one interference channel is determined by trellis processing of the at least one interference channel.

7. The method according to claim 6 , wherein the at least one interference channel comprises a single interference channel, and wherein a trellis diagram associated with the single interference channel and a trellis diagram partially or exclusively describing the data channel are processed in each time unit, wherein the states of the trellis diagram associated with the single interference channel describe the single interference channel subject to a condition of assumed states in the single interference channel, and wherein a DF contribution that is used for processing of the trellis diagram associated with the single interference channel includes information about the data channel.

8. The method according to claim 1 , wherein the states of the at least one trellis diagram that describe the data channel describe the data channel subject to a condition of current states in the at least one interference channel.

9. The method according to claim 1 , wherein the at least one interference channel comprises two interference channels, and wherein the at least two trellis diagrams comprise three trellis diagrams, and wherein the three trellis diagrams are processed in each time unit, and wherein the states of the trellis diagrams associated with the two interference channels describe a first interference channel subject to a condition of assumed states in the data channel, and describe a second interference channel subject to a condition of assumed states in the data channel, and wherein a DF contribution that is used for processing of the trellis diagrams associated with the two interference channels in each case includes information about the data channel and about the respective other interference channel.

10. The method according to claim 1 , wherein the states of one of the at least two trellis diagrams describe the data channel, the states of another of the at least two trellis diagrams describe one interference channel, wherein the information that is contained in the DF contribution that is used for processing of the trellis diagram that describes the data channel is determined by trellis processing of the trellis diagram that describes the interference channel, and the information that is contained in the DF contribution that is used for processing of the trellis diagram that describes the one interference channel is determined by trellis processing of the trellis diagram that describes the data channel.

11. The method according to claim 10 , wherein the information that is included in the DF contributions is, in each case, determined by trellis processing of the respective other channel of the data channel and the one interference channel in the previous or in the current time unit.

12. The method according to claim 10 , wherein the at least one interference channel comprises a single interference channel, and wherein two trellis diagrams, one associated with the data channel and one associated with the single interference channel are processed in each time unit.

13. The method according to claim 10 , wherein the at least one interference channel comprises two interference channels, and wherein three trellis diagrams, one associated with the data channel and two associated with the two interference channels, respectively, are processed in each time unit.

14. The method according to claim 12 , wherein in order to provide DF contributions within a current time unit, at least one additional trellis diagram for the data channel or interference channel is processed without any DF contribution within the current time unit, and the DF contribution for the interference channel or for the data channel, respectively, is determined in the same time unit during the processing of the at least one additional trellis diagram for that data channel or interference channel, respectively.