The emergence of 5G and 5G-Advanced (5G-A) communication networks brings about new features and functionalities, such as simultaneous usage of multiple bands. Multi-band cooperation provides substantial improvements in reducing pilot overhead and beam management latency, which is a hot research topic in 5G-A systems. Accurate and reasonable channel models in real propagation environments are key technology for evaluating multi-band assisted cooperative algorithms. In this paper, we first measure and analyze the propagation channels at 2.3 GHz and 3.7 bands under line-of-sight (LoS) and non-LoS (NLoS) conditions in urban macro (UMA) scenarios. Furthermore, the consistency and dissimilarity of the two channels are analyzed in the angle and delay domains. Finally, we compare the multi-frequency channel correlation using the measurement results with the 3GPP channel models. It is found out that the multi-frequency channel correlation generated by the 3GPP model differ significantly from the measured results, especially in NLoS scenario. Based on the measured data, we propose a modified channel model and compare the model with the measured data. The simulation results show that our modified model can be well matched with the measurement data and capture the multi-frequency channel characteristics. Compared to the standard model, our proposed new model ensures more accurate simulation results, which are consistent with the measurement results.
Multi-band channel measurement and characterization for 5G-Advanced wireless communications
01.06.2023
1270831 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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