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Recent research has shown that Differential Transmission (DT) can be applied to STBC systems so that the receiver does not need Channel State Information (CSI) when compared to coherent detector. In this paper, the authors propose a Generalized DT (GDT) scheme, which has a frame structure consisting of two parts, reference-block part and normal-block part. In contrast to the Conventional DT (CDT) scheme, where each transmitted block is differentially encoded based on previous transmitted block, each GDT block in both of the two parts is differentially encoded based on previous reference block.
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