RT Conference Proceedings
T1 Low-rank channel estimation for mm-Wave multiple antenna systems using joint spatio-temporal covariance matrix
A1 Chen Hu, Kun
A1 Slock, Dirk T. M.
A1 García-Armada, Ana
AB Millimeter-Wave (mm-Wave) and very large multiple antenna systems (VLMAS) are two key technologies in the deployment of Fifth Generation (5G) mobile communication systems. In order to exploit all the benefits of VLMAS, spatial and temporal (ST) features must be estimated and exploited to compute the precoding/decoding matrices. In the literature, a practical channel estimation approach is proposed by assuming that the spatial features are completely unknown, leading to non-parametric estimation in which antenna array calibration is not required. Additionally, when the signal-to-noise ratio (SNR) is not so high, a low-rank (LR) version of the estimated channel is proposed that provides better performance than the full-rank (FR) one in terms of bias-variance trade-off in the mean squared error (MSE). However, previous work assumes that spatial and temporal characteristics of the channel can be estimated separately. Then, the performance is degraded in realistic channels. In this paper, we propose an alternative way to characterize the FR estimated channel using a joint ST covariance matrix, combined with a low-complexity semi-parametric spatial response and delay estimation technique. Moreover, we propose an automatic rank-selector (ARS) based on the MSE in order to provide the best LR channel estimation for each scenario. Numerical results show that the proposed technique outperforms existing approaches in the literature.
PB IEEE
SN 978-1-7281-2373-8
YR 2019
FD 2019-01-20
LK https://hdl.handle.net/10016/36634
UL https://hdl.handle.net/10016/36634
LA eng
NO Proceedings of: 2019 IEEE International Conference on Communications Workshops (ICC Workshops), 20-24 May 2019, Shanghai, China.
NO This work has been partly funded by projects TERESA-ADA (TEC2017-90093-C3-2-R)(MINECO/AEI/FEDER, UE) and the fellowship of University Carlos III of Madrid under the program "Ayudas para la Movilidad del Programa Propio de Investigacion" granted to K. Chen-Hu
DS e-Archivo
RD 1 jul. 2024