# A Spatially Consistent Geometric D2D Small-Scale Fading Model for Multiple Frequencies

## TL;DR

This paper introduces a new small-scale fading model that integrates spatial consistency, multi-frequency correlation, and mobility, aligning well with 3GPP standards to support advanced 5G wireless technology simulations.

## Contribution

A novel SSF model that coherently combines spatial consistency, multi-frequency correlation, and mobility features within the 3GPP NR framework.

## Key findings

- Model output matches 3GPP LSF parameter distributions
- Enables simulation of complex wireless scenarios
- Supports development of new 5G technologies

## Abstract

The 3GPP new radio (NR) channel model introduced spatial consistency and a correlation model for multiple frequencies. Future extensions of this model will incorporate mobility at both ends of the link. These features are essential for many emerging wireless technologies in the 5G era. However, the existing small-scale-fading (SSF) model does not integrate these features coherently. To solve this problem, we propose a new SSF model that seamlessly integrates with the remaining NR model and allows the simultaneous simulation of all three features. We demonstrate this integration by showing that the output of the new SSF model agrees well with large-scale fading (LSF) parameter distributions provided by 3GPP. This enables the simulation of new wireless technology proposals that were difficult to realize with existing geometry-based stochastic channel models (GSCMs).