Abstract
In this paper, we investigate the impact of hardware impairments on the outage performance and the instantaneous capacity of dual-hop decode-and-forward (DF) satellite relay networks in the presence of co-channel interference. Specifically, the exact closed-form expression for the outage probability and the analytical expression for the instantaneous capacity of the system are derived over a shadowed-Rician fading channel, which provides a fast means to evaluate the impact of hardware impairments on the system performance. Our results demonstrate that the outage floor occurs and the capacity upper bound appears when the hardware impairments exist. In addition, simulation results were provided to verify the correctness of the analytical results.
Highlights
A relay is used to improve the coverage, reliability, and quality of service in wireless systems, which has become a hot research topic over the past decade [1,2,3,4]
We find that it is significant to analyze the impact of hardware impairments and co-channel interference (CCI) on the satellite relay communication network in shadowedRician channel
Similar to [2], when the hardware of each node is ideal, the received signal at R is given by y1i = h1is + vr, where y1i is the received signal transmitted by the i-th antenna of S, h1i is the channel coefficient between the i-th antenna of S and R, which follows the shadowed-Rician random variable (RV). s1i is the signal from the i-th antenna of S with average power P1i = E |s1i|2 . vr is the additive white Gaussian noise (AWGN) which is represented as vr ∼ CN 0, δr2 at R
Summary
A relay is used to improve the coverage, reliability, and quality of service in wireless systems, which has become a hot research topic over the past decade [1,2,3,4]. Most research in the area of satellite relaying assumes that the transceiver hardware of the network node is perfect This cannot be achieved in practical communication systems. We find that it is significant to analyze the impact of hardware impairments and CCI on the satellite relay communication network in shadowedRician channel. To the best of the authors’ knowledge, there is scarcely any paper that analyzes the impact of hardware impairments on a satellite relay network with CCI. The closed-form expression for the outage probability is derived which is applicable to cases involving an arbitrary number of interferers, antennas, and hardware impairments, and the derived expression provides a fast means to investigate the system performance. In the Appendix, the detailed proofs for some Lemmas and Theorems are given
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