Hybrid automatic repeat request

Channel (broadcasting)

MIMO

Computer science

Network packet

Telecommunications link

Nakagami distribution

Fading

Spectral efficiency

Noma

Block Error Rate

Computer network

IEEE Transactions on Vehicular Technology

Recently, ultra-reliable and low-latency communications (URLLC) using short-packets has been proposed to fulfill the stringent requirements regarding reliability and latency of emerging applications in 5G and beyond networks. In addition, multiple-input multiple-output non-orthogonal multiple access (MIMO NOMA) is a potential candidate to improve the spectral efficiency, reliability, latency, and connectivity of wireless systems. In this paper, we investigate short-packet communications (SPC) in a multiuser downlink MIMO NOMA system over Nakagami-m fading, and propose two antenna-user selection methods considering two clusters of users having different priority levels. In contrast to the widely-used long data-packet assumption, the SPC analysis requires the redesign of the communication protocols and novel performance metrics. Given this context, we analyze the SPC performance of MIMO NOMA systems using the average block error rate (BLER) and minimum blocklength, instead of the conventional metrics such as er...

Short-Packet Communications for MIMO NOMA Systems Over Nakagami-<i>m</i> Fading: BLER and Minimum Blocklength Analysis

Short-Packet Communications for MIMO NOMA Systems Over Nakagami-m Fading: BLER and Minimum Blocklength Analysis