Kiran, T and Rajan, Sundar B (2004) High-Rate Information-Lossless Linear Dispersion STBCs from Group Algebra. In: GLOBECOM '04. IEEE Global Telecommunications Conference, 29 November-3 December, Dallas,Texas, Vol.1, 381 -385.
For multiple-input multiple-output (MIMO) channels, at high spectral efficiencies, space-time block codes (STBC) must be designed to maximize the mutual information between the transmit and receive signals. In an uncoiled scheme (spatial multiplexing or V-BLAST), it is well-known that the Gaussian input distribution maximizes the mutual information. Hassibi and Hochwald (2002) introduced a linear dispersion (LD) framework for designing space-time codes, wherein any transmit codeword is a linear combination of a fixed set of matrices called the weight matrices. A LD space-time block code is said to be information-lossless if it does not disturb the maximum mutual information between the transmit and receive signals. In other words, a MIMO scheme using information-lossless LD space-time block codes has the same capacity as the uncoded scheme. Through computer search, information-lossless LD codes with better diversity compared to the uncoded system were found by Hassibi et al., and also by Heath et al. (2002). We give a general algebraic construction of high-rate information-lossless STBC, both square and rectangular, by restricting the weight matrices to those which form a finite group under matrix multiplication.
|Item Type:||Conference Paper|
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|Department/Centre:||Division of Electrical Sciences > Electrical Communication Engineering|
|Date Deposited:||08 Dec 2005|
|Last Modified:||19 Sep 2010 04:21|
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