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In this letter, we propose an extension of the probabilistic tree pruning sphere decoding (PTP-SD) algorithm that provides further improvement of the computational complexity with minimal extra cost and negligible performance penalty. In contrast to the PTP-SD that considers the tightening of necessary conditions in the sphere search using per-layer radius adjustment, the proposed method focuses on...
In this paper, we investigate the use of soft output decoders for signals transmitted on linear channels when applied to multiple input multiple output (MIMO) systems. A new soft output MIMO decoder is proposed. It's an extension of the hard stack decoder. A straightforward idea was to exploit internal nodes still stored in the stack at the end of hard decoding process to calculate LLR. We show that...
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