DMT-optimal, Low ML-Complexity STBC-Schemes for Asymmetric MIMO Systems
Data(s) |
2012
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Resumo |
For an n(t) transmit, nr receive antenna (n(t) x n(r)) MIMO system with quasi- static Rayleigh fading, it was shown by Elia et al. that space-time block code-schemes (STBC-schemes) which have the non-vanishing determinant (NVD) property and are based on minimal-delay STBCs (STBC block length equals n(t)) with a symbol rate of n(t) complex symbols per channel use (rate-n(t) STBC) are diversity-multiplexing gain tradeoff (DMT)-optimal for arbitrary values of n(r). Further, explicit linear STBC-schemes (LSTBC-schemes) with the NVD property were also constructed. However, for asymmetric MIMO systems (where n(r) < n(t)), with the exception of the Alamouti code-scheme for the 2 x 1 system and rate-1, diagonal STBC-schemes with NVD for an nt x 1 system, no known minimal-delay, rate-n(r) LSTBC-scheme has been shown to be DMT-optimal. In this paper, we first obtain an enhanced sufficient criterion for an STBC-scheme to be DMT optimal and using this result, we show that for certain asymmetric MIMO systems, many well-known LSTBC-schemes which have low ML-decoding complexity are DMT-optimal, a fact that was unknown hitherto. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/45756/1/iee_int_sym_inf_the_pro_2012.pdf Srinath, Pavan K and Rajan, Sundar B (2012) DMT-optimal, Low ML-Complexity STBC-Schemes for Asymmetric MIMO Systems. In: IEEE International Symposium on Information Theory, JUL 01-06, 2012, Cambridge, MA . |
Publicador |
IEEE |
Relação |
http://dx.doi.org/10.1109/ISIT.2012.6284120 http://eprints.iisc.ernet.in/45756/ |
Palavras-Chave | #Electrical Communication Engineering - Technical Reports |
Tipo |
Conference Paper PeerReviewed |