Searcharxiv⌕ Search

arXiv subjects

Hediyeh Soltanizadeh

Publications and source records attributed to Hediyeh Soltanizadeh.

2 recordsLinked to original sources

Prediction-Aware Structured Resource Control for Partitioned IRS-Assisted Mobile IoT Uplinks With Semi-Blind Cascaded-Channel Acquisition

Intelligent reflecting surface (IRS)-assisted mobile Internet of Things uplinks require joint control of channel aging, costly cascaded channel state information (CSI) acquisition, and coupled IRS/radio resources. This investigation develops a unified prediction-aware deterministic framework for partitioned IRS-assisted massive multiple-input multiple-output (mMIMO) uplinks. Direct channels are recursively tracked, whereas cascaded channels are selectively refreshed by differential semi-blind acquisition reusing the same unknown data block across a minimum-reflection baseline and DFT-coded IRS states. Moreover, finite-block acquisition covariances initialize reduced-order beam-domain prediction, which propagates only unit-beam means online and retrieves age-dependent covariances from precomputed tables. A mixed-integer nonconvex formulation captures net throughput, fairness, outage, uncertainty, switching cost, and sliding-window IRS service. The causal controller integrates covariance-floor actionability, feasible equal-size granularity, residual-feasible ownership, isolated-beam one-sweep refinement, same-block fresh-payload accounting, and service-first allocation using recomputed uncertainty-aware ZF rates and bidirectional receiver-consistent risk. Analysis establishes service-feasibility preservation, effective-channel error bounds, distribution-free reliability, and polynomial online scaling. In unseen environments, the predicted acquisition floor matches the practical semi-blind error, actionable recalibration reduces the mean recalibration rate by 31.5%, and IRS-assisted control achieves a 14.09% mean net-rate gain over direct-only transmission. Receiver-consistent allocation improves realized rate, while ablations support equal-size partitioning and single-sweep refinement; zero post-action service violations occur under nominal, mobility, and load-stress conditions.

eess.SP↗

Price of Anarchy in Multiuser Massive MIMO: Coordinated versus Uncoordinated Channel Tracking for High-Rate Internet of Things

Incorporation of high-rate internet of things (IoT) service into a massive MIMO framework is investigated. It is revealed that massive MIMO possess the inherent potential to offer such service provided it knows the channels for all devices. Our proposed method is to jointly estimate and track the channels of all devices irrespective of their current activity. Using the dynamical model for devices' channels evolution over time, optimal and sub-optimal trackers are developed for coordinated scenario. Furthermore, we introduce a new paradigm where the BS need not know the pilot access patterns of devices in advance which we refer to as uncoordinated setup. After motivating this scenario, we derive the optimal tracker which is intractable. Then, target tracking approaches are applied to address uncertainties in the measurements and derive sub-optimal trackers. Our proposed approaches explicitly address the channel aging problem and will not require downlink paging and uplink access request control channels which can become bottlenecks in crowded scenarios. The fundamental minimum mean square error (MMSE) gap between optimal coordinated and uncoordinated trackers which is defined as price of anarchy is evaluated and upper-bounded. Stability of optimal trackers is also investigated. Finally, performance of various proposed trackers are numerically compared.

eess.SP↗