17 citations · 24 across the 12 of their papers we have counts for
13 papers
Multi-cell mMIMO IRS Systems With Impairments and Aging: Phase Optimization and Receiver Design
Rakesh Munagala, Dheeraj Naidu Amudala, Rohit Budhiraja
We consider the uplink of a hardware-impaired intelligent reflective surfaces (IRS) aided multi-cell massive multiple-input multiple-output (mMIMO) system with mobile user equipmen…
Hardware-Impaired Rician-Faded Cell-Free Massive MIMO Systems With Channel Aging
Venkatesh Tentu, Dheeraj N Amudala, Anish Chattopadhyay +1
We study the impact of channel aging on the uplink of a cell-free (CF) massive multiple-input multiple-output (mMIMO) system by considering i) spatially-correlated Rician-faded cha…
LSFD for Rician-Faded Cell-Free mMIMO Systems With Channel Aging and Hardware Impairments
Anish Chattopadhyay, Venkatesh Tentu, Dheeraj Naidu Amudala +1
We study the impact of channel aging on the uplink of a cell-free massive multiple-input multiple-output system with hardware impairments. We consider a dynamic analog-to-digital c…
Hardware-Aware Pilot Decontamination Precoding for Multi-cell mMIMO Systems With Rician Fading
Harshit Kesarwani, Dheeraj Naidu Amudala, Venkatesh Tentu +1
We consider a hardware-impaired multi-cell Rician faded massive multi-input multi-output (mMIMO) system with two-layer pilot decontamination precoding, also known as large-scale fa…
Variational Learning Algorithms For Channel Estimation in RIS-assisted mmWave Systems
Milind Nakul, Anupama Rajoriya, Rohit Budhiraja
We consider the problem of estimating the channel in reconfigurable intelligent surface (RIS) assisted millimeter wave (mmWave) systems. We propose two variational expectation maxi…
OTFS Channel Estimation And Data Detection Designs With Superimposed Pilots
Himanshu B. Mishra, Prem Singh, Abhishek K. Prasad +1
This work proposes a superimposed pilot (SP)-based channel estimation and data detection framework for orthogonal time-frequency space (OTFS) scheme, wherein low-powered pilots are…
Low-Complexity ZF/MMSE Receivers for MIMO-OTFS Systems With Imperfect CSI
Prem Singh, Abhishek Gupta, Himanshu B. Mishra +1
Orthogonal time-frequency space (OTFS) scheme, which transforms a time and frequency selective channel into an almost non-selective channel in the delay-Doppler domain, establishes…
FD Cell-Free mMIMO: Analysis and Optimization
Soumyadeep Datta, Ekant Sharma, Dheeraj Naidu Amudala +2
Cell-free (CF) massive multiple-input-multiple-output (mMIMO) deployments are usually investigated with half-duplex nodes and high-capacity fronthaul links. To leverage the possibl…
Full-Duplex Cell-Free mMIMO Systems: Analysis and Decentralized Optimization
Soumyadeep Datta, Dheeraj Naidu Amudala, Ekant Sharma +2
Cell-free (CF) massive multiple-input-multiple-output (mMIMO) deployments are usually investigated with half-duplex nodes and high-capacity fronthaul links. To leverage the possibl…
Hybrid Block Diagonalization for Massive MIMO Two-Way Half-Duplex AF Hybrid Relay
Arpita Singh Chauhan, Ekant Sharma, Rohit Budhiraja
We consider a multi-pair two-way amplify-and-forward massive multi-input multi-output (MIMO) hybrid relay with MIMO user-pairs. A hybrid relay has lesser number of radio frequency…
Multi-Pair Two Way AF Full-Duplex Massive MIMO Relaying with ZFR/ZFT Processing
Ekant Sharma, Rohit Budhiraja, K Vasudevan
We consider two-way amplify and forward relaying, where multiple full-duplex user pairs exchange information via a shared full-duplex massive multiple-input multiple-output (MIMO)…
Full-Duplex Massive MIMO Multi-Pair Two-Way AF Relaying: Energy Efficiency Optimization
Ekant Sharma, Rohit Budhiraja, K Vasudevan +1
We consider two-way amplify and forward relaying, where multiple full-duplex user pairs exchange information via a shared full-duplex massive multiple-input multiple-output (MIMO)…
Linear Precoders for Non-Regenerative Asymmetric Two-way Relaying in Cellular Systems
Rohit Budhiraja, Karthik KS, Bhaskar Ramamurthi
Two-way relaying (TWR) reduces the spectral-efficiency loss caused in conventional half-duplex relaying. TWR is possible when two nodes exchange data simultaneously through a relay…