Optimal power control for real-time applications in cognitive satellite terrestrial networks
journal contributionposted on 26.05.2017, 11:21 by Shengchao Shi, Guangxia Li, Kang An, Zhiqiang Li, Gan Zheng
Cognitive satellite terrestrial networks have received considerable attention as a promising candidate to address the spectrum scarcity problem in future wireless communications. When satellite networks act as cognitive users in the networks, power control is a significant research challenge in the uplink case, especially for real-time applications. In this context, we propose two optimal power control schemes with the objectives of maximizing the delay-limited capacity and outage capacity, respectively, which are useful performance indicators for real-time applications. From the long-term and short-term aspects, average and peak power constraints are adopted respectively at the satellite user to limit the harmful interference caused to the terrestrial base station (BS). Extensive numerical results are given to demonstrate the impact of interference constraints and channel condition parameters on the performance limits of satellite users.
This work is supported by National Natural Science Foundation of China (No. 61571464, 61601511, 91338201, 91438109 and 61401507).
- Mechanical, Electrical and Manufacturing Engineering