7 papers
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…
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…