Sphere Packing Modulation in the SDMA Uplink Using K-Best Sphere Detection

Recently, the turbo-detected sphere packing (SP) aided space-time block-coding (STBC) STBC-SP scheme was demonstrated to provide useful performance improvements over conventionally-modulated orthogonal design-based STBC schemes in the context of single-user multiple-input multiple-output (SU-MIMO) s...

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Bibliographic Details
Published in:IEEE signal processing letters 2009-04, Vol.16 (4), p.291-294
Main Authors: Li Wang, Alamri, O., Hanzo, L.
Format: Article
Language:English
Subjects:
Blocking
Complexity
Constellation diagram
Design engineering
Employment
Equations
Gain
MIMO
Modulation
Multiaccess communication
Performance gain
Receiving antennas
Sake
Signal design
Signal processing
Transmitting antennas
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Summary:Recently, the turbo-detected sphere packing (SP) aided space-time block-coding (STBC) STBC-SP scheme was demonstrated to provide useful performance improvements over conventionally-modulated orthogonal design-based STBC schemes in the context of single-user multiple-input multiple-output (SU-MIMO) systems. Hence, in this letter, we extend its employment to the multiuser MIMO (MU-MIMO) scenario. For the sake of achieving a near maximum a posteriori (MAP) performance while imposing a moderate complexity, we specifically design the K -best sphere detection (SD) scheme for supporting the operation of the SP-modulated system, since the conventional SD cannot be directly applied to such a system. Consequently, with the aid of our modified SD, a significant performance gain can be achieved by the SP-modulated system over its conventionally-modulated counterpart in the context of MU-MIMO systems.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2008.2012219