TY - GEN
T1 - On the Parametrization and Statistics of Propagation Graphs
AU - Prüller, Richard
AU - Blazek, Thomas
AU - Pratschner, Stefan
AU - Rupp, Markus
PY - 2021/3/26
Y1 - 2021/3/26
N2 - Propagation graphs (PGs) serve as a frequency-selective, spatially consistent channel model suitable for fast channel simulations in a scattering environment. So far, however, the parametrization of the model, and its consequences, have received little attention. In this contribution, we propose a new parametrization for PGs that adheres to the doubly exponentially decaying cluster structure of the Saleh-Valenzuela (SV) model. We show how to compute the newly proposed internal model parameters based on an approximation of the K-factor and the two decay rates from the SV model. Furthermore, via the singular values of multiple-input multiple-output (MIMO) channels, we compare the degrees of freedom (DoF) between our new and another frequently used parametrization. Specifically, we compare the DoF loss when the distance between antennas within the transmitter and receiver arrays or the average distance between scatterers decreases. Based on this comparison, it is shown that, in contrast to the typical parametrization, our newly proposed parametrization loses DoF in both scenarios, as one would expect from a spatially consistent channel model.
AB - Propagation graphs (PGs) serve as a frequency-selective, spatially consistent channel model suitable for fast channel simulations in a scattering environment. So far, however, the parametrization of the model, and its consequences, have received little attention. In this contribution, we propose a new parametrization for PGs that adheres to the doubly exponentially decaying cluster structure of the Saleh-Valenzuela (SV) model. We show how to compute the newly proposed internal model parameters based on an approximation of the K-factor and the two decay rates from the SV model. Furthermore, via the singular values of multiple-input multiple-output (MIMO) channels, we compare the degrees of freedom (DoF) between our new and another frequently used parametrization. Specifically, we compare the DoF loss when the distance between antennas within the transmitter and receiver arrays or the average distance between scatterers decreases. Based on this comparison, it is shown that, in contrast to the typical parametrization, our newly proposed parametrization loses DoF in both scenarios, as one would expect from a spatially consistent channel model.
KW - Propagation graph
KW - multiple-input multiple-output (MIMO) channel
KW - singular value decomposition (SVD)
KW - stochastic channel modeling
UR - https://ieeexplore.ieee.org/document/9410942/
U2 - 10.23919/EuCAP51087.2021.9410942
DO - 10.23919/EuCAP51087.2021.9410942
M3 - Conference Paper
SN - 978-1-7281-8845-4
T3 - 15th European Conference on Antennas and Propagation, EuCAP 2021
SP - 1
EP - 5
BT - 2021 15th European Conference on Antennas and Propagation (EuCAP)
PB - IEEE Computer Society
T2 - 2021 15th European Conference on Antennas and Propagation (EuCAP)
Y2 - 22 March 2021 through 26 March 2021
ER -