Ecole d'ingénieur et centre de recherche en Sciences du numérique

Channel reciprocity calibration in TDD hybrid beamforming massive MIMO systems

Jiang, Xiwen; Kaltenberger, Florian

Submitted to IEEE Journal of Selected Topics in Signal Processing / Also available on ArXiv, August 25th, 2017

Hybrid analog-digital (AD) beamforming structure is a very attractive solution to build low cost massive multipleinput multiple-output (MIMO) systems. Typically these systems use a set of fixed beams for transmission and reception to avoid the need to obtain channel state information at transmitter (CSIT) for each antenna element individually. However, such a method can not fully exploit the potential of hybrid AD beamforming systems. Alternatively, CSIT can be estimated by assuming a model for the propagation channel, whereas this model is only validated in millimeter-wave (mmWave) band thanks to its poor scattering nature. In this paper, we focus on time division duplex (TDD) systems with hybrid beamforming structure and propose a reciprocity calibration scheme that allows to acquire full CSIT. Different to existing CSIT acquisition methods, our approach does not require any assumption on the channel model and can, in theory, estimate the CSIT up to an arbitrary small error.

Document Arxiv Bibtex

Titre:Channel reciprocity calibration in TDD hybrid beamforming massive MIMO systems
Mots Clés:Channel reciprocity calibration, channel state information at transmitter (CSIT), hybrid analog-digital beamforming, massive MIMO, time division duplex (TDD)
Département:Systèmes de Communication
Eurecom ref:5298
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Bibtex: @article{EURECOM+5298, year = {2017}, month = {08}, title = {{C}hannel reciprocity calibration in {TDD} hybrid beamforming massive {MIMO} systems}, author = {{J}iang, {X}iwen and {K}altenberger, {F}lorian}, journal = {{S}ubmitted to {IEEE} {J}ournal of {S}elected {T}opics in {S}ignal {P}rocessing / {A}lso available on {A}r{X}iv, {A}ugust 25th, 2017}, url = {} }
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