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Fast-Decodable MIDO Codes With Large Coding Gain.
- Source :
- IEEE Transactions on Information Theory; Feb2014, Vol. 60 Issue 2, p992-1007, 16p
- Publication Year :
- 2014
-
Abstract
- In this paper, a new method is proposed to obtain full-diversity, rate-2 (rate of two complex symbols per channel use) space-time block codes (STBCs) that are full-rate for multiple input double output (MIDO) systems. Using this method, rate-2 STBCs for 4\,\times\,2, 6\,\times\,2, 8\,\times\,2, and 12\,\times\,2 systems are constructed and these STBCs are fast ML-decodable, have large coding gains, and STBC-schemes consisting of these STBCs have a non-vanishing determinant (NVD) so that they are DMT-optimal for their respective MIDO systems. It is also shown that the Srinath-Rajan code for the 4\,\times\,2 system, which has the lowest ML-decoding complexity among known rate-2 STBCs for the 4\,\times\,2 MIDO system with a large coding gain for 4-/16-QAM, has the same algebraic structure as the STBC constructed in this paper for the 4\,\times\,2 system. This also settles in positive a previous conjecture that the STBC-scheme that is based on the Srinath-Rajan code has the NVD property and hence is DMT-optimal for the 4\,\times\,2 system. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189448
- Volume :
- 60
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Information Theory
- Publication Type :
- Academic Journal
- Accession number :
- 93875955
- Full Text :
- https://doi.org/10.1109/TIT.2013.2292513