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Among all techniques for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems, partial transmit sequence (PTS) scheme provides an effective solution. However, PTS requires an exhaustive searching for finding the best phase weighing factors, causing large amount of computational complexity. In this paper, an improved scheme for PTS is proposed, focusing...
A key issue in physical-layer network coding (PNC) is how to deal with the asynchrony between signals transmitted by multiple transmitters. That is, symbols transmitted by different transmitters could arrive at the receiver with symbol misalignment as well as relative carrier-phase offset. In this paper, 1) we propose and investigate a general framework based on belief propagation (BP) that can effectively...
In this paper, the frequency-domain pilot multiplexing techniques (FDPMTs) for the channel estimation in single-carrier frequency-domain equalization (SC-FDE) systems are studied. A simple but effective pilot-position estimation technique is proposed. The rigorous theoretical analysis and the Monte Carlo simulation results both show that our proposed method is more robust than other existing methods...
This paper studies the interference reduction, which is one the most important issue to increase the network throughput, improve the energy efficiency (green communication) and so on. In doing so, we first induce the system model consisting of one interfering node, based on several network examples. After that, the impact of time asynchrony between the interfering signal and the target signal is investigated...
Due to a great many redundancy symbols, most of the existing differential space-time-frequency (DSTF) coding schemes suffer very low transmission rates. To overcome the disadvantage and obviously enhance the total transmission rate in a differential multiple-input-multiple-output (MIMO) orthogonal-frequency-division-multiplexing (OFDM) system, a rate embedded doubly directional DSTF coding scheme...
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