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