A Novel Uplink Data Transmission Scheme For Small Packets In Massive MIMO System

TL;DR

This paper introduces a new uplink data transmission scheme for massive MIMO systems that efficiently handles small packets using compressive sensing and block precoding, enabling simultaneous user transmissions beyond traditional limits.

Contribution

It proposes a novel multiple access scheme based on compressive sensing with block precoding and develops a block-sparse model for efficient small packet transmission in massive MIMO systems.

Findings

The scheme allows simultaneous transmissions exceeding the number of antennas.

Recovery guarantees are established for the proposed method.

Numerical results show high efficiency in small packet uplink transmission.

Abstract

Intelligent terminals often produce a large number of data packets of small lengths. For these packets, it is inefficient to follow the conventional medium access control (MAC) protocols because they lead to poor utilization of service resources. We propose a novel multiple access scheme that targets massive multiple-input multiple-output (MIMO) systems based on compressive sensing (CS). We employ block precoding in the time domain to enable the simultaneous transmissions of many users, which could be even more than the number of receive antennas at the base station. We develop a block-sparse system model and adopt the block orthogonal matching pursuit (BOMP) algorithm to recover the transmitted signals. Conditions for data recovery guarantees are identified and numerical results demonstrate that our scheme is efficient for uplink small packet transmission.