Paper Info
Title
Downlink Performance Of Superimposed Pilots In Massive Mimo Systems In The Presence Of Pilot Contamination
Abstract
In this paper, we analyze the downlink (DL) performance of superimposed pilots in time division duplexing massive multiple-input multiple-output (MIMO) systems, and show that superimposed pilots offer an increased resilience to pilot contamination with respect to time-multiplexed pilots and data. Based on a closed form expression for the DL signalto-interference-plus-noise ratio (SINR) at the user terminal, we show that the DL SINR increases without bound with an increasing number of antennas at the base station (BS). In addition, we derive the Cramer-Rao lower bound (CRLB) for the channel estimator that uses superimposed pilots. The CRLB is compared with the mean-squared error and we show that the estimator achieves the CRLB asymptotically in the number of antennas at the BS. Simulation results validate our closed-form expressions and the performance of the proposed method.
Year
Venue
Keywords
2016
2016 IEEE GLOBAL CONFERENCE ON SIGNAL AND INFORMATION PROCESSING (GLOBALSIP)
Massive MIMO, pilot decontamination, superimposed pilots
Field
DocType
ISSN
Cramér–Rao bound,Base station,Computer science,Control theory,Upper and lower bounds,Signal-to-noise ratio,MIMO,Real-time computing,Telecommunications link,Duplex (telecommunications),Estimator
Conference
2376-4066
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Karthik Upadhya1244.54
sergiy a vorobyov21563113.46
Mikko Vehkaperä310315.36