1. A method for partitioning groups in a group decoding arrangement for use with a multiple antenna receiver structure comprising: (i) selecting a partition having a highest metric among partitions of a set of transmitters into a first group and a second group where the first group satisfies a group size constraint; (ii) assigning the transmitters in the first group to a new group partition and removing the transmitters in the first group from the set of transmitters; and (iii) repeating steps (i) and (ii) until all transmitters in the set of transmitters have been assigned to a new group partition.