MmWave Channel Estimation via Atomic Norm Minimization for Multi-User Hybrid Precoding
Open access
Datum
2018-04Typ
- Conference Paper
ETH Bibliographie
no
Altmetrics
Abstract
To perform multi-user multiple-input and multiple-output transmission in millimeter-wave (mmWave) cellular systems, the high-dimensional channels need to be estimated for designing the multi-user precoder. Conventional grid-based Compressed Sensing (CS) methods for mmWave channel estimation suffer from the basis mismatch problem, which prevents accurate channel reconstruction and degrades the precoding performance. This paper formulates mmWave channel estimation as an Atomic Norm Minimization (ANM) problem. In contrast to grid-based CS methods which use discrete dictionaries, ANM uses a continuous dictionary for representing the mmWave channel. We consider a continuous dictionary based on sub-sampling in the antenna domain via a small number of radio frequency chains. We show that mmWave channel estimation using ANM can be formulated as a Semidefinite Programming (SDP) problem, and the channel can be accurately estimated via off-the-shelf SDP solvers in polynomial time. Simulation results indicate that ANM can achieve much better estimation accuracy compared to grid-based CS, and significantly improves the spectral efficiency provided by multi-user precoding. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000460347Publikationsstatus
publishedExterne Links
Buchtitel
2018 IEEE Wireless Communications and Networking Conference (WCNC)Seiten / Artikelnummer
Verlag
IEEEKonferenz
Organisationseinheit
09695 - Studer, Christoph / Studer, Christoph
Anmerkungen
Conference lecture held on April 17, 2018ETH Bibliographie
no
Altmetrics