Low ML-Decoding Complexity, Large Coding Gain, Full-Rate, Full-Diversity STBCs for 2 x 2 and 4 x 2 MIMO Systems
Data(s) |
01/12/2009
|
---|---|
Resumo |
This paper deals with low maximum-likelihood (ML)-decoding complexity, full-rate and full-diversity space-time block codes (STBCs), which also offer large coding gain, for the 2 transmit antenna, 2 receive antenna (2 x 2) and the 4 transmit antenna, 2 receive antenna (4 x 2) MIMO systems. Presently, the best known STBC for the 2 2 system is the Golden code and that for the 4 x 2 system is the DjABBA code. Following the approach by Biglieri, Hong, and Viterbo, a new STBC is presented in this paper for the 2 x 2 system. This code matches the Golden code in performance and ML-decoding complexity for square QAM constellations while it has lower ML-decoding complexity with the same performance for non-rectangular QAM constellations. This code is also shown to be information-lossless and diversity-multiplexing gain (DMG) tradeoff optimal. This design procedure is then extended to the 4 x 2 system and a code, which outperforms the DjABBA code for QAM constellations with lower ML-decoding complexity, is presented. So far, the Golden code has been reported to have an ML-decoding complexity of the order of for square QAM of size. In this paper, a scheme that reduces its ML-decoding complexity to M-2 root M is presented. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/25488/1/12.pdf Srinath, K Pavan and Rajan, B Sundar (2009) Low ML-Decoding Complexity, Large Coding Gain, Full-Rate, Full-Diversity STBCs for 2 x 2 and 4 x 2 MIMO Systems. In: IEEE Journal Of Selected Topics In Signal Processing, 3 (6). pp. 916-927. |
Publicador |
IEEE |
Relação |
http://ieeexplore.ieee.org/search/wrapper.jsp?arnumber=5370663&sourceID=ISI http://eprints.iisc.ernet.in/25488/ |
Palavras-Chave | #Electrical Communication Engineering |
Tipo |
Journal Article PeerReviewed |