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In this study, the authors propose an in-band full-duplex massive multi-user multiple-input multiple-output system which exploits the separate-antenna arrays at base station and the shared-antenna at users. First, the channel state information of the two antenna arrays is estimated using the minimum mean-square-error method according to the channel reciprocity, and then the matched-filter and zero-forcing...
In this paper, a receive signal enhancement scheme based on signal sparse approximation is proposed to improve the system performance by removing the noise from the receive signal in MIMO Eigenmode Transmission system. We can obtain several independent substreams by multiplying the transmit vector by the matrix V before transmission occurs, and multiplying the receive vector by matrix U at the receiver...
UST symbol-based turbo code has recently been proposed which can reduce the system complexity and calculation amount compared with bit-wise concatenation scheme. However, the corresponding MAP decoding algorithm still makes hardware unbearable and later its simplified versions, Max-Log-MAP and Log-MAP algorithms, appeared. In this paper, we propose a multiary SOVA decoding algorithm for UST symbol-based...
In this paper, we propose a suboptimal user selection algorithm based on block diagonalization (BD) with low complexity. An upper-bound of sum-rate capacity is deduced. And considering it as the selection criterion we get our proposed algorithm. Furthermore in simplification of the proposed algorithm it is regarded as the adaptive criterion instead of capacity formula. After that we analyze the computational...
In this paper, a receive antenna selection algorithm based on the theory of convex optimization is proposed to improve the system performance over Rayleigh fading multiple-input multiple-output (MIMO) channels. The algorithm is based on the aim of minimizing error rate, and by relaxing the antenna selection variables from discrete to continuous, we arrive at a standard semidefinite convex problem...
We propose a scheme of utilizing unitary space-time symbol based nonbinary turbo code (USTSBTC) for wireless communication systems with multiple antennas over extremely fast Rayleigh block fading channels, where no channel state information (CSI) is available. We give an effective way of applying USTSBTC as an alternative to the original unitary space-time modulation and present an effective unitary...
Despite of performance improvement of multiple-input multiple-output (MIMO) system, the complexity and hardware cost is increased due to the using of multiple RF chains. Antenna subset selection is an alternative to mitigate the problem. Through selecting the best antenna subset, reduced number of RF chains can be deployed with small performance loss. In this paper, we propose a simple antenna selection...
Multiple-antenna wireless communication systems have recently attracted significant attention due to their higher capacity and better immunity to fading as compared to systems that employ single-sensor transceiver. Increasing the number of transmit and receive antennas enables to improve system performance but at the price of higher hardware cost and computational burden due to the multiple RF chains...
Theoretical investigations have proven that the system combining beamforming with space-time block coding (STBC) in MIMO systems can improve the performance efficiently. However, the multiple RF chains associated with multiple antennas are costly in terms of size, power, and hardware. Antenna selection is a low-cost low-complexity alternative to capture many of the advantages of MIMO systems. In this...
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