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CORR
2006
Springer

Multigroup-Decodable STBCs from Clifford Algebras

13 years 11 months ago
Multigroup-Decodable STBCs from Clifford Algebras
A Space-Time Block Code (STBC) in K symbols (variables) is called g-group decodable STBC if its maximumlikelihood decoding metric can be written as a sum of g terms such that each term is a function of a subset of the K variables and each variable appears in only one term. In this paper we provide a general structure of the weight matrices of multi-group decodable codes using Clifford algebras. Without assuming that the number of variables in each group to be the same, a method of explicitly constructing the weight matrices of full-diversity, delay-optimal g-group decodable codes is presented for arbitrary number of antennas. For the special case of Nt = 2a we construct two subclass of codes: (i) A class of 2a-group decodable codes with rate a 2(a-1) , which is, equivalently, a class of Single-Symbol Decodable codes, (ii) A class of (2a-2)-group decodable with rate (a-1) 2(a-2) , i.e., a class of Double-Symbol Decodable codes. Simulation results show that the DSD codes of this paper pe...
Sanjay Karmakar, B. Sundar Rajan
Added 11 Dec 2010
Updated 11 Dec 2010
Type Journal
Year 2006
Where CORR
Authors Sanjay Karmakar, B. Sundar Rajan
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