Abstract
Combining tree search detection with iterative detection-decoding allows achieving near-capacity performance in multiple antenna systems. In this contribution we show that the list sequential detector employing a Schnorr-Euchner enumeration strategy visits the minimum amount of tree nodes necessary to find a given number of hypotheses on the transmit signal which maximize the a posterior probability. It it thus the tree search scheme with lowest complexity for solving the soft output detection task optimally for a given list size.
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