• Publications
  • Influence
Enhanced intercell interference coordination challenges in heterogeneous networks
TLDR
We present the concept of heterogeneous network (HetNet) deployments as a cost effective way to deal with the unrelenting traffic demand. Expand
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Massive MIMO Systems With Non-Ideal Hardware: Energy Efficiency, Estimation, and Capacity Limits
TLDR
The use of large-scale antenna arrays can bring substantial improvements in energy and/or spectral efficiency to wireless systems due to the greatly improved spatial resolution and array gain. Expand
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Shifting the MIMO Paradigm
TLDR
Multi-user MIMO (MU-MIMO) networks reveal the unique opportunities arising from a joint optimization of antenna combining techniques with resource allocation protocols. Expand
  • 997
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Downlink MIMO HetNets: Modeling, Ordering Results and Performance Analysis
TLDR
We develop a general downlink model for multi-antenna heterogeneous cellular networks (HetNets), where base stations (BSs) across tiers may differ in terms of transmit power, target signal-to-interference-ratio (SIR), deployment density, number of transmit antennas and the type of transmission. Expand
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Cooperative Caching and Transmission Design in Cluster-Centric Small Cell Networks
TLDR
We propose a combined caching scheme, where part of the cache space in each cluster is reserved for caching the most popular content in every SBS, while the remaining is used for cooperatively caching different partitions of the less popular content. Expand
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Energy Efficient Heterogeneous Cellular Networks
TLDR
Using a stochastic geometry based model, we derive the success probability and energy efficiency in homogeneous macrocell (single-tier) and heterogeneous K-tier wireless networks under different sleeping policies. Expand
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Probabilistic Caching in Wireless D2D Networks: Cache Hit Optimal Versus Throughput Optimal
Departing from the conventional cache hit optimization in cache-enabled wireless networks, we consider an alternative optimization approach for the probabilistic caching placement in stochasticExpand
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Throughput Optimization, Spectrum Allocation, and Access Control in Two-Tier Femtocell Networks
TLDR
We investigate the effect of spectrum allocation in two-tier networks, where the macrocells employ closed access policy and the femtocells can operate in either open or closed access. Expand
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Coverage in multi-antenna two-tier networks
TLDR
In two-tier networks comprising a conventional cellular network overlaid with shorter range hotspots, the near-far effect from cross-tier interference creates dead spots where reliable coverage cannot be guaranteed to users in either tier. Expand
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Massive MIMO and small cells: Improving energy efficiency by optimal soft-cell coordination
TLDR
We analyze a combination of two densification approaches, namely “massive” multiple input multiple-output (MIMO) base stations and small-cell access points. Expand
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