Abstract
The grouping method is an efficient transmitting strategy in a spatial diversity system. In this paper, relay-based grouping methods in satellite terrestrial cooperative wireless networks are proposed. The proposed methods focus on finding out the best two signals received from relay stations in a user’s neighborhood and use the advantage of space diversity to overcome the effect of channel fading. A grouping method, called the pilot-based grouping method was proposed in our previous work. In order to improve the grouping success rate and the channel capacity, a modified grouping method is proposed. In addition, for a single relay the modified grouping method can achieve better results than the pilot-based grouping method. In the end, several analysis strategies of the grouping method for multimedia broadcast and multicast services in satellite terrestrial cooperative networks are proposed. The simulation results show the performance improvement and the system evaluation for different quality of services in the demanded relay-based cooperative networks. The proposed modified grouping methods can be widespread in any relay-based cooperative networks.
Highlights
Relay-based cooperative networks are widely studied in many communication systems
In a visible light communication (VLC) system, Kizilirmak, Narmanlioglu, and Uysal evaluated the BER performance with amplify-and-forward or decode-and-forward relaying through power allocation of source and relay terminals [6]
The basic concept of the pilot-based grouping method is that every user should b served by the best two relays to offer STC, and the same frequency cannot be allocated t different users at the same time
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Implements terrestrial stations in dense urban cities to boost the satellite signals for its digital radio service. In order to obtain the space diversity gain, the user equipment performs the STC decoding process for each group, and all the decoded signals from different channels are combined to recover the original signals. In order to improve the disadvantage in [16], we had proposed a grouping method to increase the channel capacity in [17]. We present a modified grouping method to get better performance than we proposed in [17]. The single relay allowed modified grouping method has been proposed to increase the channel capacity.
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