| Authors: | |
| Chin-Wei Hsu | |
| Hun-Seok Kim |
One Sentence Summary:
propose a novel network scheme based on nonorthogonal modulation and multiple access (NOMMA) that is tolerant to packet collisions.
Abstract:
-Ultra Narrowband (UNB) has recently received great attention for its potential to realize ultra-reliable, massive scale Low Power Wide Area Networks (LPWAN). Elaborate frequency planning and multiple access schemes have been regarded as an essential part of LPWAN because random frequencyand time-domain ALOHA accesses lead to significant network performance degradation due to inevitable packet collisions. In this paper, we propose a novel network scheme based on nonorthogonal modulation and multiple access (NOMMA) that is tolerant to packet collisions. The proposed scheme uses hyperdimensional modulation (HDM) to outperform conventional orthogonal modulation and multiple access schemes with and without prior knowledge of interference in highly congested network scenarios. Simulation results show that HDM based NOMMA can achieve 70% higher network throughput than a conventional orthogonal modulation and multiple access scheme.