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On Low-Complexity Soft-Input Soft-Output Decision-Feedback Equalizers
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DOI：10.1109/LCOMM.2016.2556681.png)
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摘要
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Compared with the soft-input, soft-output linear equalizer, the soft-input, soft-output decision-feedback equalizer (Soft-DFE) is much less investigated. This letter aims to provide a better understanding of the Soft-DFE, achieved via two comparisons: first, the two categories of designs classified by the way of treating the soft input and the soft-decision feedback (SDF), random or deterministic, are compared; second, the two different assumptions on the SDF, perfect or imperfect, are compared. The first comparison reveals the condition under which the two categories of designs are equivalent, and it is further shown that the equivalence always holds for constant-modulus modulations. The second comparison indicates that the perfect SDF assumption only incurs slight performance degradation.
Keyword:
Decision-feedback equalizer
soft-decision feedback
soft-input soft-output equalizer
turbo equalization
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4.4
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1.3W
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2.2W
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The soft-feedback equalizer for turbo equalization of highly dispersive channels用于高色散信道turbo均衡的软反馈均衡器
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