Massive MIMO Performance - TDD Versus FDD : What Do Measurements Say?
(2018) In IEEE Transactions on Wireless Communications 17(4). p.2247-2261- Abstract
Downlink beamforming in Massive MIMO either relies on uplink pilot measurements--exploiting reciprocity and time-division duplexing (TDD) operation, or on the use of a predetermined grid of beams with user equipments reporting their preferred beams, mostly in frequency-division duplexing (FDD) operation. Massive MIMO in its originally conceived form uses the first strategy, with uplink pilots, whereas there is currently significant commercial interest in the second, grid-of- beams. It has been analytically shown that with isotropic scattering (independent Rayleigh fading) the first approach outperforms the second. Nevertheless, there remains controversy regarding their relative performance in practical channels. In this contribution,... (More)
Downlink beamforming in Massive MIMO either relies on uplink pilot measurements--exploiting reciprocity and time-division duplexing (TDD) operation, or on the use of a predetermined grid of beams with user equipments reporting their preferred beams, mostly in frequency-division duplexing (FDD) operation. Massive MIMO in its originally conceived form uses the first strategy, with uplink pilots, whereas there is currently significant commercial interest in the second, grid-of- beams. It has been analytically shown that with isotropic scattering (independent Rayleigh fading) the first approach outperforms the second. Nevertheless, there remains controversy regarding their relative performance in practical channels. In this contribution, the performances of these two strategies are compared using measured channel data at 2.6 GHz.
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- author
- Flordelis, Jose LU ; Rusek, Fredrik LU ; Tufvesson, Fredrik LU ; Larsson, Erik G. and Edfors, Ove LU
- organization
- publishing date
- 2018-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- channel measurements, FDD, Massive MIMO, performance, TDD
- in
- IEEE Transactions on Wireless Communications
- volume
- 17
- issue
- 4
- pages
- 2247 - 2261
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:85041185733
- ISSN
- 1536-1276
- DOI
- 10.1109/TWC.2018.2790912
- language
- English
- LU publication?
- yes
- id
- 58cd02bd-dd1d-4b3f-bf92-fe276feb54be
- date added to LUP
- 2018-02-12 11:44:58
- date last changed
- 2024-04-01 01:01:57
@article{58cd02bd-dd1d-4b3f-bf92-fe276feb54be, abstract = {{<p>Downlink beamforming in Massive MIMO either relies on uplink pilot measurements--exploiting reciprocity and time-division duplexing (TDD) operation, or on the use of a predetermined grid of beams with user equipments reporting their preferred beams, mostly in frequency-division duplexing (FDD) operation. Massive MIMO in its originally conceived form uses the first strategy, with uplink pilots, whereas there is currently significant commercial interest in the second, grid-of- beams. It has been analytically shown that with isotropic scattering (independent Rayleigh fading) the first approach outperforms the second. Nevertheless, there remains controversy regarding their relative performance in practical channels. In this contribution, the performances of these two strategies are compared using measured channel data at 2.6 GHz.</p>}}, author = {{Flordelis, Jose and Rusek, Fredrik and Tufvesson, Fredrik and Larsson, Erik G. and Edfors, Ove}}, issn = {{1536-1276}}, keywords = {{channel measurements; FDD; Massive MIMO; performance; TDD}}, language = {{eng}}, number = {{4}}, pages = {{2247--2261}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Wireless Communications}}, title = {{Massive MIMO Performance - TDD Versus FDD : What Do Measurements Say?}}, url = {{http://dx.doi.org/10.1109/TWC.2018.2790912}}, doi = {{10.1109/TWC.2018.2790912}}, volume = {{17}}, year = {{2018}}, }