Research Article
Energy Detection in Full-Duplex Cognitive Radios under Residual Self-interference
@INPROCEEDINGS{10.4108/icst.crowncom.2014.255395, author={Taneli Riihonen and Risto Wichman}, title={Energy Detection in Full-Duplex Cognitive Radios under Residual Self-interference}, proceedings={9th International Conference on Cognitive Radio Oriented Wireless Networks}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2014}, month={7}, keywords={energy detection full duplex self-interference}, doi={10.4108/icst.crowncom.2014.255395} }- Taneli Riihonen
Risto Wichman
Year: 2014
Energy Detection in Full-Duplex Cognitive Radios under Residual Self-interference
CROWNCOM
IEEE
DOI: 10.4108/icst.crowncom.2014.255395
Abstract
This paper investigates the possibility to exploit in-band full-duplex wireless technology for simultaneous spectrum sensing and data transmission in cognitive radio terminals. The focus is especially on the receiver operating characteristics of basic energy detection. Full-duplex operation suffers from self-interference, even after cancellation since it is imperfect in practice. The effect on the probability of missed detection is analyzed, and increasing sensing time is proposed as a countermeasure for residual distortion which, unlike in half-duplex operation, does not cause large overhead due to lost transmission opportunities. The study also compares the two- and single-antenna implementations of full-duplex radios and elicits a channel imbalance problem in the former due to which sensing provides different information than the transmitting antenna would observe.