Sreedhar, Tenneti Venkata Satya ; Mehta, Neelesh B. (2022) Inter-numerology interference in 5g new radio: analysis and bounds for time-varying fading channels In: ICC 2022 - IEEE International Conference on Communications, 16-20 May 2022, Seoul, Korea.
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Official URL: https://doi.org/10.1109/ICC45855.2022.9839119
Related URL: http://dx.doi.org/10.1109/ICC45855.2022.9839119
Abstract
Mixed numerology is a new feature of the orthogonal frequency division multiplexing-based physical layer of 5G new radio (NR). It enables 5G to serve diverse use cases and services. However, the subcarriers of different numerologies, despite being non-overlapping in frequency, interfere with each other due to their different bandwidths and symbol durations. We derive novel expressions for the fading-averaged INI power at each subcarrier of a numerology in a wideband time-varying channel. These expressions cover the general family of numerologies of 5G NR, account for the guard band (which is used to mitigate INI), and apply to line-of-sight (LoS) and non-LoS channels. These lead to insightful expressions and tight bounds for the bandwidth-averaged INI power. They reveal that the INI power increases quadratically with the Doppler spread of the channel and affects higher-rate modulation and coding schemes.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Source: | Copyright of this article belongs to IEEE. |
| Keywords: | Upper bound; 5G mobile communication; OFDM; Symbols; Time-varying channels; Frequency division multiplexing; Doppler effect. |
| ID Code: | 139069 |
| Deposited On: | 15 Sep 2025 10:38 |
| Last Modified: | 15 Sep 2025 10:38 |
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