Local Multipath Model Parameters for Generating 5G Millimeter-Wave 3GPP-like Channel Impulse Response

TL;DR

This paper empirically derives detailed 5G millimeter-wave channel parameters at 28 GHz and 73 GHz, introducing a new TCSL modeling approach that accurately reproduces measured channel statistics.

Contribution

It provides new empirical large-scale and small-scale channel parameters and introduces the TCSL modeling method for generating realistic 5G millimeter-wave channel impulse responses.

Findings

Global azimuth and zenith spreads quantified for 28 GHz and 73 GHz.

Small-scale multipath cluster counts and cross-polar ratios measured.

TCSL model accurately reproduces measured channel statistics.

Abstract

This paper presents 28 GHz and 73 GHz empirically-derived large-scale and small-scale channel model parameters that characterize average temporal and angular properties of multipaths. Omnidirectional azimuth scans at both the transmitter and receiver used high gain directional antennas, from which global 3GPP modeling parameters for the mean global azimuth and zenith spreads of arrival were found to be 22 degrees and 6.2 degrees at 28 GHz, and 37.1 degrees and 3.8 degrees at 73 GHz, respectively, in non-line of sight (NLOS). Small-scale spatial measurements at 28 GHz reveal a mean cross-polar ratio for individual multipath components of 29.7 dB and 16.7 dB in line of sight and NLOS, respectively. Small-scale parameters extracted using the KPowerMeans algorithm yielded on average 5.3 and 4.6 clusters at 28 GHz and 73 GHz, respectively, in NLOS. The time cluster - spatial lobe (TCSL) modeling approach uses an alternative physically-based binning procedure and recreates 3GPP model parameters to generate channel impulse responses, as well as new parameters like the RMS lobe angular spreads useful in quantifying millimeter-wave directionality. The TCSL algorithm faithfully reproduces first- and second-order statistics of measured millimeter-wave channels.