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This paper investigates transmit antenna selection (TAS) to improve the secrecy performances in MIMO secure cooperative relay systems with an adaptive decode-and-forward (DF) relay over Nakagami-m fading channels. Due to the feedback delay of CSI used for TAS, the maximal ratio combining (MRC) receiver at the multi-antenna relay and destination suffers from the outdated channel state information (CSI)...
In identical Nakagami-m fading channels, the outage probability performance of network coding for multicast relay system is analyzed. The amplify-and-forward network coding (AFNC) transmission strategy is applied in the system. By using the outage event definition in multiuser communication system and the mutual information expressions of multiple access channels, the approximate expression of outage...
The performance of the system with maximal ratio combining and multiuser scheduling is studied in the multiuser uplink in the presence of unequal power cochannel interferences from other cells. The channels of useful and interference signals are assumed to be Nakagami-m and Rayleigh fading. The closed form expressions for outage probability and average symbol error ratio (ASER) of system are derived...
We consider a wireless relay network where two pairs of nodes exchange information with their partners through a single amplify-and-forward two-way relay with each node equipped with multiple antennas. We propose a new relaying scheme employing OFDMA for the multiple access transmission in the first time slot and OFDM/SDMA for the broadcast transmission in the second time slot to improve the sum rate...
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