The in-band full-duplex (IBFD) communication technology transmitting and receiving signals simultaneously on the same frequency, can double the spectrum utilization efficiency and data transmission rate, and has a great potential application in beyond fifth generation (B5G), sixth generation (6G) communications and satellite communications. However, the high-power signal sent from the transmitting antenna will interfere the low-power signal of interest (SOI) that received by the receiving antenna, or even submerge it completely, which is called radio frequency (RF) selfinterference. The RF self-interference is a key issue for the application of IBFD. Compared with the electronic technology, the photonic technology for RF self-interference cancellation (SIC) has the advantages of wide bandwidth and high tuning precision, exhibiting the great potential to realize high interference cancellation depth over broad band. In this paper, the operation principle of photonic RF SIC for IBFD communications is introduced and the recent work in our group is presented, including the photonic RF SIC system composed of separate optoelectronic devices and the silicon photonic integrated RF SIC system.
A photonic RF self-interference cancellation (SIC) scheme for full-duplex communication is proposed and demonstrated experimentally. It is based on phase modulation to convert the RF signal into optical domain. The interference cancellation performance of the photonic RF SIC system under different delay deviation (Δτ) and amplitude deviation (Δα) is analyzed. The cancellation depth of 34.5 dB is measured for 10 GHz signal with bandwidth of 50MHz. According to experimental results, the interference cancellation performance affected by the time delay deviation, the amplitude deviation and the phase response is investigated. The results give a direction for the improvement of system performance.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.