1. What contributions have the authors mentioned in the paper "High diversity multi-block space-time code for broadcasting applications" ?
The authors propose a STBC that calls for a 2 times 2x2 matrix seen as a two-block matrix.
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High diversity multi-block space-time code for broadcasting applications
Charbel Abdel Nour,Catherine Douillard +1 more
- 23 Apr 2012
- pp 1-6
TL;DR: A multi-block STBC that calls for a 2 times 2×2 matrix seen as a two-block matrix that enjoys a flexible transmission rate and a diversity order of 8 for a2×2 MIMO system by exploiting additional time diversity.
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Abstract: We propose a STBC that calls for a 2 times 2×2 matrix seen as a two-block matrix. It enjoys a flexible transmission rate and a diversity order of 8 for a 2×2 MIMO system by exploiting additional time diversity. Its decoding complexity is only proportional to the power of four of the constellation size. The STBC parameters have been optimized to suit fading channels with and without erasure events. These events are typical of single frequency networks that are becoming a popular topology thanks to their low bandwidth requirements. Unlike state-of-the art quasi-orthogonal structures, the proposed multi-block STBC can be jointly optimized for shaping and coding gain.
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Figures
Figure 3. BER performance of the proposed MB-STBC, for cases 1, 2, 3 and 4 of section IV-B and 4 bits/channel use. 
Figure 2. BER comparison between proposed MB-STBC, Alamouti 2x2, Golden code, spatial multiplexing, SISO and SISO with SSD over a Rayleigh fading channel for 4 bits/channel use. 
Figure 1. Simplified minimum determinant criteria as a function of angle(b) = for the 4 considered cases of section IV-B
References
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Space-time codes for high data rate wireless communication: performance criterion and code construction
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The golden code: a 2/spl times/2 full-rate space-time code with nonvanishing determinants
TL;DR: In this article, the Golden code for a 2/spl times/2 multiple-input multiple-output (MIMO) system is presented, where the Golden number 1+/spl radic/5/2 is used.
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The golden code: a 2 x 2 full-rate space-time code with non-vanishing determinants
J.-C. Belfiore,Ghaya Rekaya,Emanuele Viterbo +2 more
- 27 Jun 2004
TL;DR: This is a full-rate 2times2 linear dispersion algebraic space-time code with unprecedented performance based on the Golden number 1+radic5/2.