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Power Leakage Elimination for Wideband mmWave Massive MIMO-OFDM Systems: An Energy-Focusing Window Approach.
- Source :
-
IEEE Transactions on Signal Processing . 11/1/2019, Vol. 67 Issue 21, p5479-5494. 16p. - Publication Year :
- 2019
-
Abstract
- When the large antenna array and the large bandwidth are deployed in a massive multiple-input multiple-output (MIMO) system, the spatial-wideband effect and the related beam squint effect make the energy of each multipath component distributed mainly within a square area in angle-delay domain rather than distributed like an impulse. With the finite numbers of antennas and subcarriers in practical massive MIMO-OFDM systems, the power leakage of each path outside the corresponding square area is non-negligible. In this paper, we first derive the millimeter-wave (mmWave) massive MIMO channel model for OFDM transceivers and then design an optimal energy-focusing window, which shapes the channel in spatial-frequency domain to maximally concentrate the energy of each multipath component inside the corresponding square area in angle-delay domain. With the help of this window, the power leakage can be significantly reduced. As a result, the sparsity of mmWave channels can be primely preserved and the inter-user interference can be significantly alleviated for angle- and delay-based channel estimation and precoding. Simulation results demonstrate the effectiveness of the proposed window design. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CHANNEL estimation
*ANTENNA arrays
*LEAKAGE
*TIME-frequency analysis
*STRABISMUS
Subjects
Details
- Language :
- English
- ISSN :
- 1053587X
- Volume :
- 67
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 139809442
- Full Text :
- https://doi.org/10.1109/TSP.2019.2941065