System-Level Analysis of Phase Noise in Full-Duplex Wireless Transceivers

A system-level analysis of phase noise in full-duplex wireless transceivers is presented. It quantitatively relates phase-noise-induced residual self-interference (SI) noise power spectral density with full-duplex system design parameters, such as the amount of SI suppression in the antenna and RF domains, the SI channel delay, voltage-controlled oscillator (VCO) phase noise and figure of merit, and VCO power consumption. Full-duplex transceiver noise simulations and SI cancellation measurements validate our results.

I. Introduction

Transmission and reception in wireless communication systems are usually separated in either time or frequency. However, this division results in inefficient utilization of the radio spectrum. Full-duplex radios that concurrently transmit and receive at the same frequency have the potential to double the spectrum efficiency in the physical layer and to open up new possibilities at the wireless network level [1]–[3].