Zero-Forcing Precoding in the Measured Massive MIMO Downlink: How Many Antennas Are Needed?
Joint Authors
Zhang, Jianhua
Zheng, Zhe
Wu, Xiaoyong
Liu, Danpu
Tian, Lei
Source
International Journal of Antennas and Propagation
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-11
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
In order to understand how many antennas are needed in a multiuser massive MIMO system, theoretical derivation and channel measurements are conducted; the effect of a finite number of base station (BS) antennas on the performance capability of Zero-forcing (ZF) precoding in a rich scattering channel is quantified.
Through the theoretical analysis, the needed number of the transmit antennas for ZF precoder to achieve a certain percentage of the broadcast channel (BC) capacity will monotonically decrease with the increase of the transmit signal-to-noise ratio (SNR), and the lower bound of the needed transmit antennas is derived with a simple expression.
Then the theoretical derivation is verified by simulation results, and the transmission performance is evaluated by channel measurements in urban microcell (UMi) scenario with frequencies of 3.5 and 6 GHz.
From the measurement results, the ZF capability can be enhanced by improving the SNR and enlarging the antenna array spacing when the massive MIMO channel does not under a favorable propagation condition.
Furthermore, because of the lower spatial correlation, the performance of ZF precoding at 6 GHz is closer to the theoretical derivation than 3.5 GHz.
American Psychological Association (APA)
Zheng, Zhe& Zhang, Jianhua& Wu, Xiaoyong& Liu, Danpu& Tian, Lei. 2019. Zero-Forcing Precoding in the Measured Massive MIMO Downlink: How Many Antennas Are Needed?. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1157351
Modern Language Association (MLA)
Zheng, Zhe…[et al.]. Zero-Forcing Precoding in the Measured Massive MIMO Downlink: How Many Antennas Are Needed?. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1157351
American Medical Association (AMA)
Zheng, Zhe& Zhang, Jianhua& Wu, Xiaoyong& Liu, Danpu& Tian, Lei. Zero-Forcing Precoding in the Measured Massive MIMO Downlink: How Many Antennas Are Needed?. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1157351
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157351