# Finite blocklength feedback approach for multi-antenna wireless channels

## TL;DR

This paper proposes new finite blocklength coding schemes for multi-antenna wireless channels to enable ultra-reliable low-latency communication.

## Contribution

The novelty lies in extending the Schalkwijk-Kailath scheme to multi-antenna channels with feedback for improved reliability and low latency.

## Key findings

- The proposed feedback-based schemes nearly achieve the channel capacities in simulations.
- The schemes are effective for multi-antenna wireless channels under finite blocklength constraints.

## Abstract

Ultra-reliable low-latency communication (URLLC) is a key technology in future wireless communications, and finite blocklength (FBL) coding is the core of the URLLC. In this paper, FBL coding schemes for the wireless multi-antenna channels are proposed, which are based on the classical Schalkwijk-Kailath scheme for the point-to-point additive white Gaussian noise channel with noiseless feedback. Simulation examples show that the proposed feedback-based schemes almost approach the corresponding channel capacities.