Performance Evaluation of Cross M-QAM Modulation Over Standardized RF2 5G Frequency Bands Using the η-μ Fading Model

This paper delves into the study of the generalized short-term fading model $\eta $ - $\mu $ . It introduces, for the first time in the literature, closed-form expressions for the Symbol Error Probability (SEP) of cross M-QAM modulation operating under the $\eta $ - $\mu $ fading channel. Furthermore, the SEP of the aforementioned modulation is evaluated across selected frequency bands within the standardized Range Frequency 2 (RF2) millimeter-wave (mm-wave) for 5G systems, specifically at 26, 28, and 39 GHz. The assessment is based on channel modeling results available in the literature, derived from an extensive measurement campaign conducted under both line-of-sight (LoS) and non-line-of-sight (nLoS) conditions within an indoor environment, and considering different Tx-Rx distances. The findings provide valuable information on the performance of cross M-QAM modulation across different modulation orders, frequencies, line-of-sight conditions, and Tx-Rx distances in realistic mm-wave 5G scenarios, enhancing our understanding of its suitability in various real deployment conditions.