Mini-Slot-Assisted Short Packet URLLC:Differential or Coherent Detection?
Canjian Zheng, Fu-Chun Zheng, Jingjing Luo, Pengcheng Zhu, Xiaohu You, and Daquan Feng

TL;DR
This paper proposes an adaptive detection scheme combining differential and coherent methods for mini-slot-assisted URLLC, balancing reliability, latency, and training overhead in short packet communications.
Contribution
It introduces a dynamic adaptive approach that switches between differential and coherent detection based on scenario-specific factors, supported by theoretical analysis and simulations.
Findings
Adaptive detection improves reliability and reduces latency.
Differential detection is effective in low SNR or high mobility scenarios.
Simulation results confirm the proposed scheme's feasibility and performance benefits.
Abstract
One of the primary challenges in short packet ultra-reliable and low-latency communications (URLLC) is to achieve reliable channel estimation and data detection while minimizing the impact on latency performance. Given the small packet size in mini-slot-assisted URLLC, relying solely on pilot-based coherent detection is almost impossible to meet the seemingly contradictory requirements of high channel estimation accuracy, high reliability, low training overhead, and low latency. In this paper, we explore differential modulation both in the frequency domain and in the time domain, and propose adopting an adaptive approach that integrates both differential and coherent detection to achieve mini-slot-assisted short packet URLLC, striking a balance among training overhead, system performance, and computational complexity. Specifically, differential (especially in the frequency domain) and…
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Taxonomy
TopicsAdvanced biosensing and bioanalysis techniques · Semiconductor materials and devices · Radiation Detection and Scintillator Technologies
