Implicit Pilots for an Efficient Channel Estimation in Simplified Massive MIMO Schemes with Precoding
Joint Authors
Dinis, R.
Marques da Silva, Mário
Guerreiro, João
Source
International Journal of Antennas and Propagation
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-01-27
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
This paper proposes a new channel estimation scheme based on implicit pilots, optimized for a simplified massive multiple input, multiple output (MIMO), implemented with precoding, combined with Single-Carrier with Frequency-Domain Equalization (SC-FDE) modulations.
We propose an iterative receiver that considers an iterative detection with interference cancellation and channel estimation.
The channel estimates are usually obtained with the help of pilot symbols and/or training sequences multiplexed with data symbols.
Since the required overheads in massive MIMO schemes can be too high, leading to spectral degradation, the use of superimposed pilots (i.e., pilots added to data) is an efficient alternative.
Three different types of preprocessing algorithms are considered in this paper: Zero-Forcing Transmitter (ZFT), Maximum Ratio Transmitter (MRT), and Equal Gain Transmitter (EGT).
The main advantage of MRT and EGT is that they do not require matrix inversions.
Nevertheless, some level of interference is generated in the decoding process.
Such interference is mitigated by employing an optimized iterative receiver.
By employing the proposed implicit pilots, the performance of MRT and EGT is very close to the Matched Filter Bound just after a few iterations, even when the number of transmit or receiver antennas is not much higher than the number of data streams.
American Psychological Association (APA)
Marques da Silva, Mário& Dinis, R.& Guerreiro, João. 2019. Implicit Pilots for an Efficient Channel Estimation in Simplified Massive MIMO Schemes with Precoding. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1157522
Modern Language Association (MLA)
Marques da Silva, Mário…[et al.]. Implicit Pilots for an Efficient Channel Estimation in Simplified Massive MIMO Schemes with Precoding. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1157522
American Medical Association (AMA)
Marques da Silva, Mário& Dinis, R.& Guerreiro, João. Implicit Pilots for an Efficient Channel Estimation in Simplified Massive MIMO Schemes with Precoding. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1157522
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157522