12 citations · 16 across the 8 of their papers we have counts for
9 papers
An information-theoretic branch-and-prune algorithm for discrete phase optimization of RIS in massive MIMO
I. Zakir Ahmed, Hamid R. Sadjadpour, Shahram Yousefi
In this paper, we consider passive RIS-assisted multi-user communication between wireless nodes to improve the blocked line-of-sight (LOS) link performance. The wireless nodes are…
Constrained Resource Allocation Problems in Communications: An Information-assisted Approach
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
We consider a class of resource allocation problems given a set of unconditional constraints whose objective function satisfies Bellman's optimality principle. Such problems are ub…
A Low-Complexity Multi-Survivor Dynamic Programming for Constrained Discrete Optimization
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
Constrained discrete optimization problems are encountered in many areas of communication and machine learning. We consider the case where the objective function satisfies Bellman'…
An Optimal Low-Complexity Energy-Efficient ADC Bit Allocation for Massive MIMO
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
Fixed low-resolution Analog to Digital Converters (ADC) help reduce the power consumption in millimeter-wave Massive Multiple-Input Multiple-Output (Ma-MIMO) receivers operating at…
Optimal Bit Allocation Variable-Resolution ADC for Massive MIMO
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
In this paper, we derive an optimal ADC bit-allocation (BA) condition for a Single-User (SU) Millimeter wave (mmWave) Massive Multiple-Input Multiple-Output (Ma-MIMO) receiver equi…
Capacity analysis and bit allocation design for variable-resolution ADCs in Massive MIMO
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
We derive an expression for the capacity of massive multiple-input multiple-output Millimeter wave (mmWave) channel where the receiver is equipped with a variable-resolution Analog…
Single-User mmWave Massive MIMO: SVD-based ADC Bit Allocation and Combiner Design
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
In this paper, we propose a Singular-Value-Decomposition-based variable-resolution Analog to Digital Converter (ADC) bit allocation design for a single-user Millimeter wave massive…
A Joint Combiner and Bit Allocation Design for Massive MIMO Using Genetic Algorithm
I. Zakir Ahmed, Hamid Sadjadpour, Shahram Yousefi
In this paper, we derive a closed-form expression for the combiner of a multiple-input-multiple-output (MIMO) receiver equipped with a minimum-mean-square-error (MMSE) estimator. W…
Exact MIMO Zero-Forcing Detection Analysis for Transmit-Correlated Rician Fading
Constantin Siriteanu, Steven Blostein, Akimichi Takemura +3
We analyze the performance of multiple input/multiple output (MIMO) communications systems employing spatial multiplexing and zero-forcing detection (ZF). The distribution of the Z…