Khawla Alnajjar

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In an uplink massive multiple-input-multiple-output deployment with distributed single-antenna users and a large base-station array, we consider several combinations of receivers using linear combiners (maximum ratio combining (MRC) and zero forcing (ZF)) in conjunction with Vertical Bell Laboratories Layered Space Time (V-BLAST). We show that the(More)
We consider the performance of a low complexity Vertical Bell Laboratories Layered Space Time system with a maximum ratio combining receiver (LC-VBLAST) in an uplink massive multiple-input-multiple-output (MIMO) deployment with single antenna users. This receiver is known to give a similar error rate performance to zero forcing (ZF) for simple systems while(More)
In an uplink massive multiple-input-multiple-output (MIMO) deployment with distributed single-antenna users and a large base-station array, we consider the performance of Vertical Bell Laboratories Layered Space Time (V-BLAST) with maximum ratio combining (MRC) and V-BLAST with zero forcing (ZF). In the performance evaluation, we include the effects of(More)
In this paper, we take a proposed low-complexity Vertical Bell Laboratories Layered Space Time receiver based on maximal ratio combining and further simplify the algorithm by replacing the channel norm ordering by a power based ordering. The receiver operates in an uplink massive multiple-input-multiple-output deployment with distributed single-antenna(More)
To overcome computation complexity due to inverse calculation that occurs when using linear receivers such as zero forcing (ZF) in massive multiple-input-multiple-output (MIMO), we propose a simple approximation method which depends on the maximum element of the diagonal matrix multiplied by a scaling factor that controls its tuning. This method solves(More)
In order to manage interference in Long Term Evolution (LTE) using single-input single-output (SISO) or multiuser multi-input multi-output systems (MIMO), we investigate interference alignment mitigation techniques for LTE systems and provide an analytic extension and new method. Although precoding generally is applied for each subcarrier, we observe that(More)
In order to manage interference in the K-user interference channel we study optimal interference aligned solutions using a modified version of the chordal distance between the signal and the interference space as a metric. A locally optimal algorithm to optimize this distance is described. The proposed metric and algorithm are validated by an improvement in(More)
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