Non-Unitary-Weight Space-Time Block codes with Minimum Decoding Complexity

Space-time block codes (STBCs) from complex orthogonal designs (CODs) are single-symbol decodable/symbol-by-symbol decodable (SSD); however, SSD codes are obtainable from designs that are not CODs. Recently, two such classes of SSD codes have been studied: (i) coordinate interleaved orthogonal designs (CIODs) and (ii) minimum-decoding-complexity (MDC) STBCs from quasi-ODs (QODs). The class of CIODs have non-unitary weight matrices when written as a linear dispersion code (LDC) proposed by Hassibi and Hochwald, whereas the other class of SSD codes including CODs have unitary weight matrices. In this paper, we construct a large class of SSD codes with non-unitary weight matrices. Also, we show that the class of CIODs is a special class of our construction