Full-Duplex Radio for Uplink/Downlink Transmission with Spatial Randomness

TL;DR

This paper analyzes a full-duplex wireless system with spatial randomness, deriving formulas for outage probability and sum rate, revealing conditions where full-duplex outperforms half-duplex despite interference challenges.

Contribution

It provides closed-form expressions and asymptotic analysis for full-duplex uplink/downlink systems considering interference, offering new insights into performance limits and benefits.

Findings

Full-duplex can outperform half-duplex under certain conditions.

Derived closed-form outage probability and sum rate expressions.

Asymptotic analysis reveals key system behavior and performance degradation.

Abstract

We consider a wireless system with a full-duplex (FD) access point (AP) that transmits to a scheduled user in the downlink (DL) channel, while receiving data from an user in the uplink (UL) channel at the same time on the same frequency. In this system, loopback interference (LI) at the AP and inter user interference between the uplink (UL) user and downlink (DL) user can cause performance degradation. In order to characterize the effects of LI and inter user interference, we derive closed-form expressions for the outage probability and achievable sum rate of the system. In addition an asymptotic analysis that reveals insights into the system behavior and performance degradation is presented. Our results indicate that under certain conditions, FD transmissions yield performance gains over half-duplex (HD) mode of operation.