1 research outputs found
Transceiver Design to Maximize Sum Secrecy Rate in Full Duplex SWIPT Systems
This letter considers secrecy simultaneous wireless information and power
transfer (SWIPT) in full duplex systems. In such a system, full duplex capable
base station (FD-BS) is designed to transmit data to one downlink user and
concurrently receive data from one uplink user, while one idle user harvests
the radio-frequency (RF) signals energy to extend its lifetime. Moreover, to
prevent eavesdropping, artificial noise (AN) is exploited by FD-BS to degrade
the channel of the idle user, as well as to provide energy supply to the idle
user. To maximize the sum of downlink secrecy rate and uplink secrecy rate, we
jointly optimize the information covariance matrix, AN covariance matrix and
receiver vector, under the constraints of the sum transmission power of FD-BS
and the minimum harvested energy of the idle user. Since the problem is
non-convex, the log-exponential reformulation and sequential parametric convex
approximation (SPCA) method are used. Extensive simulation results are provided
and demonstrate that our proposed full duplex scheme extremely outperforms the
half duplex scheme