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Design and Analysis of Novel Precoding Scheme for LSAS Using Power Allocation

Title
Design and Analysis of Novel Precoding Scheme for LSAS Using Power Allocation
Authors
Malik S.Moon S.Kim B.You C.Liu H.Kim J.-H.Kim J.Hwang I.
Ewha Authors
김정호
SCOPUS Author ID
김정호scopus
Issue Date
2016
Journal Title
Wireless Personal Communications
ISSN
0929-6212JCR Link
Citation
vol. 91, no. 2, pp. 811 - 828
Keywords
Eigen-beamformingLSASLTE-AMFMMBPower allocationRZFZF
Publisher
Springer New York LLC
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Massive MIMO systems (also known as “large-scale antenna system” and “full-dimension MIMO”) significantly reduce air interface latency by using a large excess of service antennas over active terminals and time-division duplex operation. We consider the downlink of a time-division duplexing multicell multiuser MIMO system in which the base transceiver stations are equipped with a very large number of antennas. Assuming channel estimation through uplink pilots, arbitrary antenna correlations, and user distributions, we derive approximations of achievable rates with linear precoding techniques—namely, zero forcing, matched filtering, eigen-beamforming (EBF), and regularized zero-forcing (RZF). The approximations are tight in the large system limit with an infinitely large number of antennas and user terminals, but they match our simulations for realistic system dimensions. We further show that a simple EBF precoding scheme can achieve the same performance as RZF with one order of magnitude fewer antennas in both uncorrelated and correlated fading channels. Our simulation results show that our proposed precoding scheme is better than the conventional scheme. Moreover, we have used two channel environments for further analysis of our algorithm—long-term evolution advanced and millimeter wave mobile broadband channels. © 2016, Springer Science+Business Media New York.
DOI
10.1007/s11277-016-3498-z
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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