Paper Info
Title
Mean-Based Reciprocity Calibration In Tdd Massive Mimo Systeminspec Keywordsother Keywords
Abstract
Non-reciprocity limits the potential of time division duplexing (TDD) massive multiple-input and multiple-output (MIMO) systems. Due to the reciprocal channel, there is no need for downlink (DL) pilot transmission implies computational complexity reduction and saving precious time resources. In this study, the DL channel matrix is estimated using the uplink channel matrix by a novel reciprocity calibration technique. Non-reciprocity arises due to the hardware mismatch (HM) across the base station (BS) and the user terminal (UT)/both. Its detrimental effect causes amplitude and phase impairment in the downlink signal transmission. Since a massive MIMO network has a large number of antenna elements across the BS, hence the instantaneous HM coefficient cannot be determined accurately. For solving such a problem, the authors use the statistical response of the hardware unit. Considering a complex Gaussian hardware response across each antenna terminal, the probability density function (PDF) of amplitude and phase mismatch is derived. They also derive the joint PDF of amplitude and phase mismatch, considering the HM. Simulation results address the sensitivity and complexity for evaluating the sum-rate capacity under three linear precoders (matched filter, regularized zero-forcing, and zero-forcing), which validate their effectiveness in this scenario.
Year
DOI
Venue
2020
10.1049/iet-com.2019.1049
IET COMMUNICATIONS
Keywords
DocType
Volume
radio receivers, computational complexity, interference suppression, precoding, wireless channels, calibration, radiofrequency interference, MIMO communication, matrix algebra, antenna arrays, linear codes, TDD massive MIMO system, nonreciprocity limits, time division duplexing massive multiple&#8208, input, reciprocal channel, downlink pilot transmission, computational complexity reduction, saving precious time resources, DL channel matrix, uplink channel matrix, novel reciprocity calibration technique, hardware mismatch, base station, BS, user terminal, detrimental effect, phase impairment, downlink signal transmission, massive MIMO network, antenna elements, instantaneous HM coefficient, statistical response, hardware unit, complex Gaussian hardware response, antenna terminal, phase mismatch, sensitivity
Journal
14
Issue
ISSN
Citations 
22
1751-8628
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Varun Kumar100.34
Sarat Kumar Patra22710.08
Poonam Singh3327.23