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In this paper, we consider an OFDM-based cooperative diversity system where a source communicates with a destination with the help of a relay in Amplify-and-Forward relaying or Decode-and-Forward relaying. First, we propose a scheme to selecting the "best" relay to assist the transmission. And then, we present two power allocation schemes to minimize system outage probability, based on statistical...
There is narrow space and harsh environment underground coal mines. When radio signals are transmitted, diffraction, attenuation, multi-path and scattering are often very serious. All the problems make the WSN system difficult to reach the set bit error rate when transmitting images. V-MIMO, which makes every node of the WSN work together, is adopted in the paper. In order to improve the system capability...
Linear equalizers (LEs) have been widely adopted for practical systems due to their low computational complexity. However, it is also well known that LEs provide inferior performance relative to a maximum-likelihood equalizer (MLE) or other near-MLEs, because LEs usually cannot collect the diversity order enabled by the transmitter and at the same time they lose mutual information. More importantly,...
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