Abstract
In this paper, noncoherent transmission algorithms are proposed in a two-way relay transmission (TWRT), where differential space-time block codes based multiple-symbol differential detection (MSDD) is performed. Specifically, generalized likelihood ratio test aided MSDD (GLRT-MSDD) is developed with the exhaustive search in the TWRT. In order to solve the challenging problem of high complexity, the GLRT-MSDD model is reformulated and a decision-feedback aided MSDD (DF-MSDD) model is derived. Furthermore, performance analysis and the simulations confirm that the proposed DF-MSDD provides solid bit error-rate performance with a lower complexity than GLRT-MSDD in the TWRT.
Highlights
In one-way transmission, coherent detection is capable of achieving performance improvement with accurate channel state information (CSI) [1]
It is interesting to point out that, when compared to the existing multiple-symbol differential detection (MSDD) advocated in the noncoherent two-way relay transmission (TWRT) [10, 11], the system performance is significantly improved by employing the differential space-time block codes (DSTBC) with the proposed generalized likelihood ratio test (GLRT)-MSDD
According to the DF theory, we propose a transformation for DSTBC aided GLRT-MSDD and propose DF based MSDD (DF-MSDD), which allow us to simplify the classic exhaustive search as detection with a lower computational complexity
Summary
In one-way transmission, coherent detection is capable of achieving performance improvement with accurate channel state information (CSI) [1]. It is interesting to point out that, when compared to the existing MSDDs advocated in the noncoherent TWRT [10, 11], the system performance is significantly improved by employing the DSTBC with the proposed GLRT-MSDD. It imposes an exponentially increasing complexity with the number of the observation windows. The proposed MSDD algorithms are attractive for the noncoherent TWRT and can be applied in many noncoherent transmission scenarios Relying on this technique, in this paper the system description and simulation experiments are Mathematical Problems in Engineering discussed in the DSTBC aided UWB TWRT. Lower-case (upper-case) boldface symbols represent vectors (matrices); (⋅)T and Tr(⋅) denote the transpose and the trace of a matrix, respectively; ∗ stands for convolution; δ(t) represents the Dirac delta function
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