2012•International Journal of Computer and Communication EngineeringRequires access

Quasi Orthogonal Space Time Block Codes Using Various Sub-Block Matrices

Eman Hamdan, Onsy Abdel Alim, Noha Korany

Abstract

Space-time block codes (STBCs) from Orthogonal designs have attracted attention due to their fast maximum likelihood decoding and full diversity, but the maximum symbol transmission rate for complex signals is only ¾ for four transmit antennas so quasi orthogonal STBC was proposed, in this paper the structure and characteristics of some new type of a Quasi-orthogonal space time block codes (QOSTBC)is analyzed, The error performance for these codes for four transmitted antennas over uncorrelated and spatially correlated MIMO channels is investigated. A maximum likelihood (ML) decoding algorithm for the suggested code is also provided.

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Key concepts: Block (permutation group theory), Block code, Computer science, Mathematics, Algorithm, Combinatorics, Decoding methods