Differential orthogonal space-time block codes for four transmit antennas

• Published in: Electronics letters Vol. 50; no. 3; pp. 180 - 182
• Main Authors: Ben Slimane, E, Jarboui, S, Bouallègue, A
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 30.01.2014; Institution of Engineering and Technology; John Wiley & Sons, Inc
• Subjects: Algorithmics. Computability. Computer arithmetics; Antennas; Applied sciences; blind detection; Blinds; Block codes; Coding, codes; Coherence; coherent STBC scheme; Computer science; control theory; systems; correlation; correlation methods; differential detection; differential encoder; DSTBC; Encoders; Exact sciences and technology; high‐order differential space‐time block code; Information and communications; Information, signal and communications theory; Noise levels; orthogonal codes; Radiocommunications; Receivers; Signal and communications theory; space‐time block codes; space‐time diversity; Symbols; Telecommunications; Telecommunications and information theory; Theoretical computing; transmit antennas; Transmitters. Receivers; transmitting antennas; trellis codes; trellis diagram; Viterbi algorithm; DSTBC; transmitting antennas; space-time diversity; trellis codes; trellis diagram; orthogonal codes; high-order differential space-time block code; transmit antennas; Viterbi algorithm; blind detection; correlation; space-time block codes; differential encoder; coherent STBC scheme; differential detection; correlation methods; MIMO system; Viterbi code; Block code; Space-time codes; Diversity reception; Non coherent detection; Wireless network; Metric; Blind identification; Ordered space; Differential modulation
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2013.3875

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.