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Early-detection scheme based on sequential tests for low-latency communications.

Diego Barragán-Guerrero1,2, Minh Au3, Ghyslain Gagnon1

  • 1Department of Electrical Engineering, École de technologie supérieure, Montréal, H3C 1K3 QC Canada.

EURASIP Journal on Wireless Communications and Networking
|March 27, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces an early-detection scheme to cut communication latency using sequential tests without feedback. The method achieves optimal low-latency strategies for various communication systems, including multi-hop and multi-carrier transmissions.

Keywords:
Early detectionFinite blocklengthLow latency communicationsMultialternative sequential tests

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Area of Science:

  • Information Theory
  • Digital Communications
  • Signal Processing

Background:

  • Reducing communication latency is crucial for real-time applications.
  • Existing methods often rely on feedback channels, increasing latency.
  • Finite blocklength regimes present unique challenges for efficient communication.

Purpose of the Study:

  • To propose an early-detection scheme for reducing communication latency.
  • To analyze the scheme's performance in additive white Gaussian noise (AWGN) channels.
  • To demonstrate its effectiveness in various communication scenarios.

Main Methods:

  • Sequential observation processing for symbol decision-making.
  • Analysis of optimal achievable latency under finite blocklength constraints.
  • Application of random coding and pre-coding techniques for band-limited signals.

Main Results:

  • Optimal achievable latency was determined for AWGN channels.
  • Demonstrated significant latency reduction (e.g., of symbol time for specific parameters).
  • Proved the existence of optimal low-latency strategies for parallel Gaussian channels and multi-carrier modulation.

Conclusions:

  • The proposed early-detection scheme effectively reduces communication latency.
  • The scheme is adaptable to band-limited orthogonal frequency-division multiplexing (OFDM) signals.
  • It shows promise for improving performance in multi-hop communication systems.