Performance evaluation for underlay cognitive satellite-terrestrial cooperative networks

Abstract

With the continuously increasing demand for broadband applications and services, underlay cognitive satellite-terrestrial networks, enabling to accommodate better wireless services within the scarce spectrum, have attracted tremendous attentions recently. In this network, satellite communications are allowed to operate in the frequency bands allocated to terrestrial networks under the interference constraints imposed by terrestrial network, which may lead to a performance degradation of the satellite network. To guarantee the performance of the primary terrestrial network as well as the secondary satellite network, we introduce the cooperation into cognitive satellite-terrestrial networks and investigate the performance of the new framework, i.e., cognitive satellite-terrestrial cooperative network (CSTCN). Specifically, by restricting the transmit power of satellite communications with interference power constraints imposed by terrestrial communications, we firstly obtain the received signal-to-interference-plus-noise ratio (SINR) of the considered network. Moreover, by employing the moment generating function (MGF) approach, closed-form expressions for symbol error rate (SER) and outage probability (OP) of the considered cognitive network are derived. The analytical results obtained in this paper can provide theoretical support for optimizing the performance of satellite-terrestrial networks.

Towards 6G wireless communication networks: vision, enabling technologies, and new paradigm shifts

“…Satellite communication networks can provide valuable benefits, e.g., seamless wireless coverage, for extending current terrestrial communication networks, and are deemed as promising solutions to be incorporated in future wireless network architectures [217][218][219][220]228,229], as shown in Figure 25. Multi-beam satellites have been widely adopted in satellite communication systems as they can provide increasing wireless data rates.…”

Effect of Strong Time-Varying Transmission Distance on LEO Satellite-Terrestrial Deliveries

“…Low-earth orbit (LEO) satellites normally orbit hundreds of kilometers above the earth and LEO satellite communication systems have recently gained great research interest due to less power consumption, lower transmission delays, and higher data rates, which are expected to be incorporated in future wireless networks [19]- [23]. Similar to traditional terrestrial wireless communication systems, they also suffer from two types of channel fading, namely, small-scale fading and largescale fading.…”

Outage analysis of partial relay selection based on shadowing side information in hybrid satellite‐terrestrial relay networks

“…Therefore, based on the fact that cooperative communications can mitigate the masking effect, facilitate the communication quality, and provide reliable transmission, a novel framework referred as the hybrid satellite‐terrestrial relay network (HSTRN) has been proposed in Digital Video Broadcast‐Satellite Hand‐held (DVB‐SH) standard, where relaying component can assist the communication between satellite and terrestrial user components. By employing spatial diversity in terms of data rate and reliability, HSTRN can improve the performance of the satellite‐terrestrial communication . For HSTRN, although the joint transmission with multiple relays can improve the diversity gain of the system, it also increases the spectrum, power cost, and bandwidth loss correspondingly, which is not suitable for resource‐constrained satellite systems.…”

“…By employing spatial diversity in terms of data rate and reliability, HSTRN can improve the performance of the satellite-terrestrial communication. 5,6 For HSTRN, although the joint transmission with multiple relays can improve the diversity gain of the system, it also increases the spectrum, power cost, and bandwidth loss correspondingly, which is not suitable for resource-constrained satellite systems. Accordingly, it is meaningful to conduct relay selection scheme in HSTRN for reducing system overhead while guaranteeing system performance.…”