Abstract
This paper proposes a new non-stationary three-dimensional (3D) channel model for a physical millimeter wave (mm-Wave) multiple-input multiple-output (MIMO) channel. This MIMO channel model is driven by the trajectory of a moving point scatterer, which allows us to investigate the impact of a single moving point scatterer on the propagation characteristics in an indoor environment. Starting from the time-variant (TV) channel transfer function, the temporal behavior of the proposed non-stationary channel model has been analyzed by studying the TV micro-Doppler characteristics and the TV mean Doppler shift. The proposed channel model has been validated by measurements performed in an indoor environment using a MIMO radar kit operating at 24 GHz. For the measurement campaign, we used a single swinging pendulum as a model for a moving point scatterer. The trajectory of the pendulum has been captured by an inertial measurement unit attached to the pendulum and by a motion capture camera system. The measured trajectories are fed into the proposed mm-Wave MIMO channel model. The results obtained for the micro-Doppler characteristics show an excellent agreement between the proposed MIMO channel model and real-world measured channels in the presence of a moving point scatterer. We believe that our model can serve as a basis for the development of novel non-stationary MIMO channel models capturing the effects caused by moving objects and people.
Highlights
I N recent years, millimeter wave communications has been proposed as key enabler for the development of the fifth generation (5G) communication systems [1]
We have presented the TV-channel transfer function (CTF) capturing the effect of the mobility of the moving point scatterer
The TV micro-Doppler signature of the proposed channel model has been validated by measured data, which are obtained by using a multiple-input multiple-output (MIMO) radar operating at 24 GHz
Summary
I N recent years, millimeter wave (mm-Wave) communications has been proposed as key enabler for the development of the fifth generation (5G) communication systems [1]. N. Avazov et al.: A Trajectory-Driven 3D Non-Stationary mm-Wave MIMO Channel Model for a Single Moving Point Scatterer building environments. The goal of this paper is to extend the analysis of a SIMO channel presented in [26] to a MIMO channel model To this aim, we propose a method for the design of a 3D trajectorydriven non-stationary MIMO channel model for a moving point scatterer in an indoor environment. To the best of our knowledge, the impact of different MIMO links on the micro-Doppler signatures of a moving point scatterer has not been studied yet In this regard, the main novelties of this paper are as follows: 1) We propose a 3D non-stationary mm/Wave MIMO channel model for a moving object modelled by a point scatterer in indoor environments.
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