Open AccessDifferential orthogonal space‐time block codes for four transmit antennas
Author(s) -
Ben Slimane E.,
Jarboui S.,
Bouallègue A.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.3875
Subject(s) - block code , space time , computer science , block (permutation group theory) , electronic engineering , differential (mechanical device) , mathematics , telecommunications , engineering , decoding methods , aerospace engineering , geometry , chemical engineering
A new high‐order differential space‐time block code (DSTBC) is introduced as an attractive alternative to the well‐known coherent space‐time block code (STBC) by providing both full space‐time diversity and blind detection. A differential detection based on the orthogonal STBC scheme is proposed. The proposed differential scheme is a generalisation of the recent DSTBC already designed for two transmit antennas. The proposed differential encoder consists of a specific trellis diagram that creates a positive correlation between successive differential data. At the receiver side, the well‐known Viterbi algorithm is applied using a specific metric that nearly compensates for the 3 dB penalty commonly introduced by the symbol by symbol differential schema, and shows a 0.5 dB performance loss only from the coherent STBC scheme.