Xu, Chao, Sugiura, Shinya, Ng, Soon Xin and Hanzo, Lajos (2013) Spatial modulation and space-time shift keying: optimal performance at a reduced detection complexity IEEE Transactions on Communications, 61, (1), pp. 206-216. (doi:10.1109/TCOMM.2012.100312.120251).
Abstract
Abstract—In this paper, we propose a comprehensive reduced-
complexity detector both for hard-decision-aided as well as for
the soft-decision-assisted Spatial Modulation (SM)/Space-Time
Shift Keying (STSK). More explicitly, the detection of the SM
scheme, which activates a single one out of M antennas to
transmit a single LPSK/QAM symbol, may be carried out by
detecting the antenna activation index m and the LPSK/QAM
symbol sl separately, so that the detection complexity may be
reduced from the order of O(M · L) to the lower bound of
O(M + log2 L). However, the QAM aided STSK hard detection
proposed in [1] results in a performance loss. Furthermore, the
Max-Log-MAP algorithm proposed for soft STSK detection in [2]
only takes into account the maximum a posteriori probabilities,
which also imposed a performance degradation. Therefore, in
this paper, we propose a novel solution for hard-decision-aided
SM/STSK detection, which retains its optimal performance,
despite its reduced detection complexity, when either LPSK
or LQAM is employed. Furthermore, we propose the reduced-
complexity Approx-Log-MAP algorithm conceived for the soft-
decision-aided SM/STSK detector, in order to replace the sub-
optimal Max-Log-MAP algorithm.
Index Terms—Spatial Modulation, Space-Time Shift Keying,
Reduced complexity design, Turbo detection.
More information
Identifiers
Catalogue record
Export record
Altmetrics
Contributors
University divisions
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.