Full Duplex Wireless Communication Systems for 5G - WSU Project

This report provides an overview of full duplex communication systems, focusing on their application in 5G wireless networks. It discusses the advantages of full duplex over simplex and half-duplex modes, highlighting the challenge of self-interference and various cancellation techniques. The report classifies self-cancellation methods into passive and active suppression, detailing antenna separation, directional SI suppression, analog cancellation, digital cancellation, and combined analog/digital cancellation approaches. References to relevant research papers are included, offering a comprehensive understanding of the current state and future directions of full duplex technology in 5G systems. Desklib offers a range of solved assignments and past papers for students.

FULL DUPLEX
COMMUNICATION
SYSTEM

 Transmission-direction of information
flow between two communication
devices
 Modes of transmission of data include:
◦Simplex
◦Full duplex
◦Half duplex
Introduction

 Can transmit data simultaneously in
both directions on transmission path
 Used to transmit data over serial
communication link
 Need two wires for sending data over
serial communication link
 Capacity of channel is common to
communicating devices all the time
Full duplex

 Due to large power difference between
imposed by the transmission of device
and lower power that is received
coming from remote transmit antenna
(Liu et al., 2015).
 Excessive self-interference result in
lowered full duplex systems capacity
that is less than half duplex system.
Self-cancellation

 Passive suppression: The attenuation
of path loss signal power as a result of
physical separation between receives
& transmits antennas of similar device
 Active suppression: Able to enhance
full duplex communication at limits to
the tune of 6 meters as well as
transmit powers of the normal WiFi
devices
Classification of Self-cancellation
methods

 Classified into:
◦ SI cancellation & Antenna separation: An
increase in path loss between receive & transmit
antennas is effective approach to attenuation the
SI power
◦ Directional SI suppression: Main radiation modes
of receive/transmit antenna for full duplex device
have limited intersection
◦ Enable partial suppression of the SI before the
radio frequency front end of the receiver
Passive SI cancellation

 Classified into:
◦ Analog cancellation
◦ Digital cancellation
◦ Combined analog/digital cancellation
Active SI suppression

 Bi, S., Zeng, Y. and Zhang, R., 2016.
Wireless powered communication
networks: An overview. IEEE Wireless
Communications, 23(2), pp.10-18
 Chung, M., Sim, M.S., Kim, J., Kim, D.K.
and Chae, C.B., 2015. Prototyping real-
time full duplex radios. IEEE
Communications Magazine, 53(9), pp.56-
63
 Liu, G., Yu, F.R., Ji, H., Leung, V.C. and Li,
X., 2015. In-band full-duplex relaying: A
survey, research issues and
References