Non-Orthogonal Modulation for Short Packets in Massive Machine Type Communications
Chin-Wei Hsu, Hun-Seok Kim · 2020
Massive Machine Type Communication (mMTC) enables novel applications but its dense deployment and short packet properties lead to new challenges for physical layer design. This paper investigates hyper-dimensional modulation (HDM), a recently proposed novel non-orthogonal modulation, for short packet communications with superior interference tolerance in mMTC. We propose a new tree-based K-best decoding algorithm for HDM to improve the packet error rate performance in both additive white Gaussian noise (AWGN) and interference-limited scenarios. Simulation results show that the proposed algorithm can achieve 0.5 - 4 dB gain in AWGN and interference-limited channels compared to the Polar code with CRC (cyclic redundancy check)-aided list decoding.