Serial Interference Cancellation for Improving uplink in LoRa-like Networks

TL;DR

This paper introduces a novel receiver design employing serial interference cancellation to enhance uplink performance in LoRa-like IoT networks, enabling simultaneous demodulation of multiple users and increasing device capacity.

Contribution

It proposes a new receiver architecture for LoRa networks that significantly improves multi-user demodulation using serial interference cancellation, a novel approach in this context.

Findings

Enables simultaneous demodulation of multiple users

Significantly increases network device capacity

Improves uplink performance in LoRa-like networks

Abstract

In this paper, we present a new receiver design, which significantly improves performance in the Internet of Things networks such as LoRa, i.e., having a chirp spread spectrum modulation. The proposed receiver is able to demodulate multiple users simultaneously transmitted over the same frequency channel with the same spreading factor. From a non-orthogonal multiple access point of view, it is based on the power domain and uses serial interference cancellation. Simulation results show that the receiver allows a significant increase in the number of connected devices in the network.