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It is proposed here a way to improve the BER in a relay channel using maximum likelihood detection (MLD) over flat Rayleigh fading channels in a wireless Multiple Input-Multiple Output (MIMO) antenna system. The proposed relaying scheme uses the detect-and-forward protocol and consists of a new threshold mechanism based on symbol LLR at the relay. The relay determines whether each symbol can be relayed...
We propose an improved Soft Forwarding (SF) protocol which is based on the symbol-by-symbol detection at the relay node, unlike in the conventional relaying strategy which implements a bit-by-bit signal analysis at the relay node. A relay node which is typically acts like a repeater can avoid unnecessary computation complexity and above all, is resource efficient if compared to the baseline SF. The...
Maximum Likelihood Detection (MLD) featuring Log-likelihood (LLR) combining technique has been introduced in earlier works to achieve diversity gains in block fading channels for one relay node. In this paper, we extend this strategy to multiple relay systems (MRS) and introduce a new method such that the computational complexity of MLD is further reduced. This method approximates bit LLR values from...
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