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Error-rate evaluation of space-time codes using union bounds sometimes requires very heavy computational loads and so is impractical to use. In this paper, a common function shared by different union bounds is derived and used to develop a modified union bound (MUB) for error-rate evaluation. Results of numerical evaluations and Monte-Carlo simulation on two 2times2 rotation-based S-T codes show that...
The formula for the exact union bound (EUB) on BER based on the exact closed-form pair-wise error probability (PEP) is most accurate for calculating the bit-error-rates (BERs) of space-time (S-T) codes in multiple-input multiple output (MIMO) systems. In this paper, it is shown that using the exact closed-form PEP formula for numerical calculations of the PEP or the EUB on BER could produce negative...
In this paper, we analyze the decode-and-forward cooperative multihop transmission. Different from conventional multihop transmission, each node achieves the spatial diversity by combining all the independently fading symbols from previous nodes on the route line. We consider the possibility for the relay node to forward error-detected symbols, and propose an adaptive transmission protocol to compensate...
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