TY - GEN
T1 - Impact of Improper Gaussian Signaling on the Achievable Rate of Overlay Cognitive Radio
AU - Amin, Osama
AU - Abediseid, Walid
AU - Alouini, Mohamed-Slim
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2017/5/12
Y1 - 2017/5/12
N2 - Improper Gaussian signaling (IGS) has been recently shown to provide performance improvements in underlay cognitive radio systems as opposed to the conventional proper Gaussian signaling (PGS) scheme. For the first time, this paper implements IGS scheme in overlay cognitive radio system, where the secondary transmitter broadcasts a mixture of two different signals. The first signal is selected from the PGS scheme to support the primary message transmission. On the other hand, the second signal is chosen to be from the IGS scheme in order to reduce the interference effect on the primary receiver. We then optimally design the overlay cognitive radio that employs IGS to maximize the secondary link achievable rate while satisfying the minimum rate requirement of the primary network. In particular, we derive closed form expressions for the circularity coefficient used in the IGS scheme and the power distribution parameters. Simulation results are provided to support our theoretical derivations.
AB - Improper Gaussian signaling (IGS) has been recently shown to provide performance improvements in underlay cognitive radio systems as opposed to the conventional proper Gaussian signaling (PGS) scheme. For the first time, this paper implements IGS scheme in overlay cognitive radio system, where the secondary transmitter broadcasts a mixture of two different signals. The first signal is selected from the PGS scheme to support the primary message transmission. On the other hand, the second signal is chosen to be from the IGS scheme in order to reduce the interference effect on the primary receiver. We then optimally design the overlay cognitive radio that employs IGS to maximize the secondary link achievable rate while satisfying the minimum rate requirement of the primary network. In particular, we derive closed form expressions for the circularity coefficient used in the IGS scheme and the power distribution parameters. Simulation results are provided to support our theoretical derivations.
UR - http://hdl.handle.net/10754/625007
UR - http://ieeexplore.ieee.org/document/7925572/
UR - http://www.scopus.com/inward/record.url?scp=85019656271&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2017.7925572
DO - 10.1109/WCNC.2017.7925572
M3 - Conference contribution
SN - 9781509041831
BT - 2017 IEEE Wireless Communications and Networking Conference (WCNC)
PB - Institute of Electrical and Electronics Engineers (IEEE)
ER -