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In this paper, we propose an enhanced multi-user eigen channel selection (E-MES) solution for multiple-input multiple-output (MIMO) multi-user downlink transmissions exploiting sequential projection and zero-forming (ZF) algorithm. In the existing solutions, eigen channel of each candidate user was pre-defined at the start of the multi-eigen selection, and this limits user's eigen channel adaptation...
Coordinated multipoint (CoMP) processing is a key enabling technique in Long Term Evolution-Advanced (LTE-A) to improve the system spectral efficiency. Among the CoMP processing schemes, while joint transmission (JT) from multiple coordinated eNBs has high computing complexity due to the data sharing, coordinated scheduling/coordinated beamforming (CS/CB) lowers the backhaul requirement. In this paper,...
In this paper, we investigate the performance of a cross‐layer (physical and MAC) design for multiple‐input multiple‐output (MIMO) system that aims at maximizing the throughput of ad hoc networks by selecting the optimum antenna combination. Employing this cross‐layer design is shown to improve the overall network performance relative to the case where no antenna selection (AS) is used. To solve the...
Recent research shows that K user time-varying interference channel is capable of achieving K/2 degrees of freedom based on the idea of interference alignment. In multiple-input-multiple-output (MIMO) interference channels, appropriate transmit precoder design plays a pivotal role in efficiently suppressing the co-channel interference. In this paper, we propose a generalized precoder design forMIMO...
Coordinated multipoint (CoMP) transmission is capable of significantly improving both the cell average and cell-edge performance in terms of spectral efficiency (SE). It is therefore regarded as a key enabling technique in the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE)-Advanced. Early research mainly concentrates on coordinated transmissions from several eNBs. Recently, coordination...
Coordinated multipoint (CoMP) processing is regarded as an enabling technique in Long Term Evolution (LTE)-Advanced to improve both the cell average and cell-edge spectral efficiency (SE). In this paper, we propose a novel precoder design algorithm based on polar decomposition (PD) for non-coherent joint processing CoMP (NCJP-CoMP) in order to enhance the cell-edge performance, when considering the...
Designing transmit precoding vectors based on maximizing signal-to-leakage-and-noise ratio (SLNR) provides a practical solution to the coupling problem encountered in the conventional designing methodology by maximizing signal-to-interference-plus-noise ratio (SINR). In this contribution, a simple but sophisticated iterative algorithm is proposed to find the optimal power allocation for the sake of...
The performance of a cross-layer (physical and MAC) design for multiple-input multiple-output (MIMO) system that maximizes the throughput of ad-hoc networks by selecting the optimum antenna combination is investigated. This cross-layer design is shown to improve the overall network performance relative to the case with no antenna selection. To further improve the overall network throughput, we minimize...
In this work, we base on multi-layered perceptron neural networks with backpropagation algorithm (MLP/BP) to construct soft decision feedback equalizers (DFEs). The proposal is used to recover distorted 16-point quadrature amplitude modulation (16-QAM) signal. For better performance, error control codes (ECC) are applied to enhance the accuracy of the transmitted data. From the simulations, we note...
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