Studies on Amplify-and-Forward Cooperative Communications in Hybrid Satellite-Terrestrial Networks

• Main Authors: Jhou, Singhong, 周星宏
• Other Authors: Wen, Jyhhorng
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/25959669824514658551

碩士 === 國立暨南國際大學 === 通訊工程研究所 === 99 === Cooperative communication uses the concept of space diversity to follow the multiple-input multiple-output communication system. The uses of relay stations make the transmission more reliable and higher data rate. Compared with the multi-input multi-output system, cooperative communication can reduce the hardware design complexity and cost. In recent years the development of wireless communication, the cooperative multi-hop relay station assisted technologies improve the performance and services range of wireless systems, and the use of relay stations a virtual antenna for diversity gain improve the link reliability. In this thesis, we study the downlink cooperative communication systems of hybrid satellite-terrestrial networks. The system architecture includes a source, a relay station with Amplify-and-Forward (AF) strategy and a destination. According to the proposed channel environment, we derive analytical expressions for the probability density function (PDF) and the moment generating function (MGF) of receiver's signal-to-noise ratio (SNR) at the destination, to obtain the average symbol error probability (Average Symbol Error Probability, ASEP) of M-QAM. Finally, we extend the issue to the environment with a single source, multiple relay stations and single destination. To maximum the SNR at the destination, the selection the best relay stations for amplify-and-forward (S-AF) is explored for multiple relay stations. The formula derived for each of the issues in this thesis are verified by using the computer simulation.