Single-Symbol Maximum Likelihood Decodable STBCs with Fewer Zero-Entries

Authors:
Van-Bien Pham;Weixing Sheng;Mao Wang;Feng Shu;Xiaofeng Ma
Affiliations:
Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing, China 210094;Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing, China 210094;Institute of Wireless Communication and Sensor Network, Nanjing University of Science and Technology, Nanjing, China 210094;Institute of Wireless Communication and Sensor Network, Nanjing University of Science and Technology, Nanjing, China 210094;Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing, China 210094
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

Two generalized constructions of single-symbol maximum likelihood (ML) decodable space-time block codes (SSDCs), the coordinate interleave orthogonal design (CIOD) and the generalized CIOD (GCIOD), have been proposed by Khan et al. Their main disadvantage is that there are too many zero entries in the codeword matrix. The transmission of these zero-valued symbols causes switching off some of the transmit antennas resulting in a high peak-to-average power ratio and also imposing a severe constraint on hardware implementation of the code. Based on the orthogonal construction of orthogonal space-time block codes and coordinate interleaving, a new generalized construction of SSDCs is proposed. Our proposed codes not only maintain the desirable properties of high rate, full transmit diversity and single-symbol ML decoding similar to CIODs and GCIODs, but also have fewer zero entries in its codeword matrix than CIODs and GCIODs.